# CVE-2026-27858: dovecot23: This update for dovecot23 fixes the following issues:  - CVE-2024-23184: parsing of messages containing many address...

CVE-2026-27858 is fixed in 26 products on 1 platform, first by RHSA-2026:17602, released March 27, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-27858
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0080
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 26, 2026

## Description

This update for dovecot23 fixes the following issues:  - CVE-2024-23184: parsing of messages containing many address headers (From, To, Cc, Bcc, etc.) could be excessively CPU   intensive (bsc#1229184). - CVE-2024-23185: large headers can cause resource exhaustion when parsing message (bsc#1229183). - CVE-2025-59028: Invalid base64 authentication can cause DoS for other logins (bsc#1260894). - CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing   (bsc#1260895). - CVE-2025-59032: pigeonhole: ManageSieve panic occurs with sieve-connect as a client (bsc#1260902). - CVE-2026-27852: DoS by sending mail with bad header (bsc#1276799). - CVE-2026-27855: OTP driver vulnerable to replay attack (bsc#1260900). - CVE-2026-27856: Doveadm credentials were not checked using timing-safe checking function (bsc#1260899). - CVE-2026-27857: sending excessive parenthesis causes imap-login to use excessive memory (bsc#1260898). - CVE-2026-27858: pigeonhole: managesieve-login can allocate large amount of memory during authentication (bsc#1260901). - CVE-2026-27859: excessive RFC 2231 MIME parameters in email would can excessive CPU usage (bsc#1260897). - CVE-2026-33263: submission-login: Panic when mail_max_userip_connections is reached (bsc#1276794). - CVE-2026-33603: login: base64 input can contain tabs that bypass IPC protection (bsc#1265147). - CVE-2026-33604: SMTP Smuggling via Missing Dot-Stuffing (bsc#1276802). - CVE-2026-33605: managesieve-login: Pre-auth crash (bsc#1276809). - CVE-2026-33606: dsync: Mail content can cause dsync protocol injection (bsc#1276800). - CVE-2026-33607: IMAP LIST match_sub() Exponential Backtracking -- CPU Denial of Service (bsc#1276795). - CVE-2026-40014: CPU DoS via Crafted References Header (bsc#1276804). - CVE-2026-40015: imap-hibernate can be crashed (bsc#1276812). - CVE-2026-40016: Sieve :contains/:matches O(NxM) substring match bypasses sieve_max_cpu_time limit (bsc#1265148). - CVE-2026-40019: managesieve-login pre-auth infinite loop (bsc#1276811). - CVE-2026-40020: IMAP folders can be shared-spammed to everyone (bsc#1265149). - CVE-2026-40203: IMAP Compression Can Reveal Whether a Small Synced Email Body Matches Sender-Chosen Text   (bsc#1276815). - CVE-2026-40205: OAuth2 passdb scope enforcement bypass via OR semantics in remote validation path (bsc#1276820). - CVE-2026-42006: imap-login: uncontrolled memory usage with excessive bracing over IMAP (bsc#1265150). - CVE-2026-42007: editheader RCE (bsc#1276817). - CVE-2026-42008: XCLIENT FORWARD= bare token not namespaced (bsc#1276824). - CVE-2026-42391: imap: Pre-login memory/CPU growth with ID command (bsc#1276835). - CVE-2026-42393: doveadm_password or api key length can still be leaked with timing comparisons (bsc#1276827). - CVE-2026-42395: Single NUL-Byte XCLIENT FORWARD Payload Crashes (bsc#1276826). - CVE-2026-52681: Sieve resource usage tracking lost when active script changes (bsc#1276828). - CVE-2026-52687: IMAP: COMPRESS ZSTD can cause excessive memory usage (bsc#1276837). - CVE-2026-73208: auth: db-oauth2: aud claim used as fallback for missing scope claim (bsc#1276830). - CVE-2026-73209: imap-login crash: Self-recursion on zero-output decompress chunks (bsc#1276833).  Changes for dovecot23:  - Update to version 2.3.21.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dovecot Debian 12.15 (bookworm) | 1:2.3.19.1+dfsg1-2.1+deb12u2 | [DEBIAN-CVE-2026-27858](https://patchblox.com/security/data/fix/linux/debian-cve-2026-27858.md) | Mar 27, 2026 |
| Linux | dovecot Debian 13.5 (trixie) | 1:2.4.1+dfsg1-6+deb13u4 | [DEBIAN-CVE-2026-27858](https://patchblox.com/security/data/fix/linux/debian-cve-2026-27858.md) | Mar 27, 2026 |
| Linux | dovecot Debian 14 | 1:2.4.3+dfsg1-1 | [DEBIAN-CVE-2026-27858](https://patchblox.com/security/data/fix/linux/debian-cve-2026-27858.md) | Mar 27, 2026 |
| Linux | dovecot RHEL 10 | 2.3.21-16.el10_0.1 | [RHSA-2026:17602](https://patchblox.com/security/data/fix/linux/rhsa-2026-17602.md) | Mar 27, 2026 |
| Linux | dovecot RHEL 8 | 1:2.3.16-7.el8_10 | [RHSA-2026:13830](https://patchblox.com/security/data/fix/linux/rhsa-2026-13830.md) | May 15, 2026 |
| Linux | dovecot RHEL 9 | 1:2.3.16-18.el9_8 | [RHSA-2026:19364](https://patchblox.com/security/data/fix/linux/rhsa-2026-19364.md) | May 15, 2026 |
| Linux | dovecot almalinux 10 | 1:2.3.21-19.el10_2 | [ALSA-2026:19149](https://patchblox.com/security/data/fix/linux/alsa-2026-19149.md) | May 19, 2026 |
| Linux | dovecot almalinux 8 | 1:2.3.16-7.el8_10 | [ALSA-2026:13830](https://patchblox.com/security/data/fix/linux/alsa-2026-13830.md) | May 5, 2026 |
| Linux | dovecot almalinux 9 | 1:2.3.16-18.el9_8 | [ALSA-2026:19364](https://patchblox.com/security/data/fix/linux/alsa-2026-19364.md) | May 19, 2026 |
| Linux | dovecot amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot ol 10 | 1:2.3.21-16.el10_1.1 | [ELSA-2026-13498](https://patchblox.com/security/data/fix/linux/elsa-2026-13498.md) | May 5, 2026 |
| Linux | dovecot ol 8 | 1:2.3.16-7.el8_10 | [ELSA-2026-13830](https://patchblox.com/security/data/fix/linux/elsa-2026-13830.md) | May 6, 2026 |
| Linux | dovecot ol 9 | 1:2.3.16-15.el9_7.1 | [ELSA-2026-13857](https://patchblox.com/security/data/fix/linux/elsa-2026-13857.md) | May 6, 2026 |
| Linux | dovecot rocky 10 | 1:2.3.21-19.el10_2 | [RLSA-2026:19149](https://patchblox.com/security/data/fix/linux/rlsa-2026-19149.md) | May 29, 2026 |
| Linux | dovecot rocky 8 | 1:2.3.16-7.el8_10 | [RLSA-2026:13830](https://patchblox.com/security/data/fix/linux/rlsa-2026-13830.md) | May 7, 2026 |
| Linux | dovecot rocky 9 | 1:2.3.16-18.el9_8 | [RLSA-2026:19364](https://patchblox.com/security/data/fix/linux/rlsa-2026-19364.md) | May 28, 2026 |
| Linux | dovecot-auth-lua Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-auth-lua 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-auth-lua-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-auth-lua Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-auth-lua 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-auth-lua-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-auth-lua Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-auth-lua 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-auth-lua-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-core Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-core 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-core-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-core Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-core 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-core-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-core Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-core 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-core-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-debuginfo amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-debugsource amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-devel RHEL 8 | 1:2.3.16-7.el8_10 | [RHSA-2026:13830](https://patchblox.com/security/data/fix/linux/rhsa-2026-13830.md) | May 15, 2026 |
| Linux | dovecot-devel RHEL 9 | 1:2.3.16-18.el9_8 | [RHSA-2026:19364](https://patchblox.com/security/data/fix/linux/rhsa-2026-19364.md) | May 15, 2026 |
| Linux | dovecot-devel almalinux 10 | 1:2.3.21-19.el10_2 | [ALSA-2026:19149](https://patchblox.com/security/data/fix/linux/alsa-2026-19149.md) | May 19, 2026 |
| Linux | dovecot-devel almalinux 8 | 1:2.3.16-7.el8_10 | [ALSA-2026:13830](https://patchblox.com/security/data/fix/linux/alsa-2026-13830.md) | May 5, 2026 |
| Linux | dovecot-devel almalinux 9 | 1:2.3.16-18.el9_8 | [ALSA-2026:19364](https://patchblox.com/security/data/fix/linux/alsa-2026-19364.md) | May 19, 2026 |
| Linux | dovecot-devel amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-devel ol 10 | 1:2.3.21-16.el10_1.1 | [ELSA-2026-13498](https://patchblox.com/security/data/fix/linux/elsa-2026-13498.md) | May 5, 2026 |
| Linux | dovecot-devel ol 8 | 1:2.3.16-7.el8_10 | [ELSA-2026-13830](https://patchblox.com/security/data/fix/linux/elsa-2026-13830.md) | May 6, 2026 |
| Linux | dovecot-devel ol 9 | 1:2.3.16-15.el9_7.1 | [ELSA-2026-13857](https://patchblox.com/security/data/fix/linux/elsa-2026-13857.md) | May 6, 2026 |
| Linux | dovecot-flatcurve Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-flatcurve 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-flatcurve-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-gssapi Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-gssapi 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-gssapi-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-gssapi Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-gssapi 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-gssapi-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-gssapi Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-gssapi 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-gssapi-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-imapd Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-imapd 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-imapd-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-imapd Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-imapd 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-imapd-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-imapd Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-imapd 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-imapd-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-ldap Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-ldap 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-ldap-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-ldap Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-ldap 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-ldap-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-ldap Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-ldap 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-ldap-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-lmtpd Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-lmtpd 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-lmtpd-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-lmtpd Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-lmtpd 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-lmtpd-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-lmtpd Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-lmtpd 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-lmtpd-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-lucene Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-lucene 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-lucene-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-managesieved Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-managesieved 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-managesieved-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-managesieved Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-managesieved 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-managesieved-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-managesieved Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-managesieved 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-managesieved-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-mysql RHEL 8 | 1:2.3.16-7.el8_10 | [RHSA-2026:13830](https://patchblox.com/security/data/fix/linux/rhsa-2026-13830.md) | May 15, 2026 |
| Linux | dovecot-mysql RHEL 9 | 1:2.3.16-18.el9_8 | [RHSA-2026:19364](https://patchblox.com/security/data/fix/linux/rhsa-2026-19364.md) | May 15, 2026 |
| Linux | dovecot-mysql Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-mysql 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-mysql-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-mysql Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-mysql 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-mysql-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-mysql Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-mysql 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-mysql-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-mysql almalinux 10 | 1:2.3.21-19.el10_2 | [ALSA-2026:19149](https://patchblox.com/security/data/fix/linux/alsa-2026-19149.md) | May 19, 2026 |
| Linux | dovecot-mysql almalinux 8 | 1:2.3.16-7.el8_10 | [ALSA-2026:13830](https://patchblox.com/security/data/fix/linux/alsa-2026-13830.md) | May 5, 2026 |
| Linux | dovecot-mysql almalinux 9 | 1:2.3.16-18.el9_8 | [ALSA-2026:19364](https://patchblox.com/security/data/fix/linux/alsa-2026-19364.md) | May 19, 2026 |
| Linux | dovecot-mysql amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-mysql ol 10 | 1:2.3.21-16.el10_1.1 | [ELSA-2026-13498](https://patchblox.com/security/data/fix/linux/elsa-2026-13498.md) | May 5, 2026 |
| Linux | dovecot-mysql ol 8 | 1:2.3.16-7.el8_10 | [ELSA-2026-13830](https://patchblox.com/security/data/fix/linux/elsa-2026-13830.md) | May 6, 2026 |
| Linux | dovecot-mysql ol 9 | 1:2.3.16-15.el9_7.1 | [ELSA-2026-13857](https://patchblox.com/security/data/fix/linux/elsa-2026-13857.md) | May 6, 2026 |
| Linux | dovecot-mysql-debuginfo amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-pgsql RHEL 8 | 1:2.3.16-7.el8_10 | [RHSA-2026:13830](https://patchblox.com/security/data/fix/linux/rhsa-2026-13830.md) | May 15, 2026 |
| Linux | dovecot-pgsql RHEL 9 | 1:2.3.16-18.el9_8 | [RHSA-2026:19364](https://patchblox.com/security/data/fix/linux/rhsa-2026-19364.md) | May 15, 2026 |
| Linux | dovecot-pgsql Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-pgsql 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-pgsql-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-pgsql Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-pgsql 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-pgsql-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-pgsql Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-pgsql 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-pgsql-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-pgsql almalinux 10 | 1:2.3.21-19.el10_2 | [ALSA-2026:19149](https://patchblox.com/security/data/fix/linux/alsa-2026-19149.md) | May 19, 2026 |
| Linux | dovecot-pgsql almalinux 8 | 1:2.3.16-7.el8_10 | [ALSA-2026:13830](https://patchblox.com/security/data/fix/linux/alsa-2026-13830.md) | May 5, 2026 |
| Linux | dovecot-pgsql almalinux 9 | 1:2.3.16-18.el9_8 | [ALSA-2026:19364](https://patchblox.com/security/data/fix/linux/alsa-2026-19364.md) | May 19, 2026 |
| Linux | dovecot-pgsql amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-pgsql ol 10 | 1:2.3.21-16.el10_1.1 | [ELSA-2026-13498](https://patchblox.com/security/data/fix/linux/elsa-2026-13498.md) | May 5, 2026 |
| Linux | dovecot-pgsql ol 8 | 1:2.3.16-7.el8_10 | [ELSA-2026-13830](https://patchblox.com/security/data/fix/linux/elsa-2026-13830.md) | May 6, 2026 |
| Linux | dovecot-pgsql ol 9 | 1:2.3.16-15.el9_7.1 | [ELSA-2026-13857](https://patchblox.com/security/data/fix/linux/elsa-2026-13857.md) | May 6, 2026 |
| Linux | dovecot-pgsql-debuginfo amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-pigeonhole RHEL 8 | 1:2.3.16-7.el8_10 | [RHSA-2026:13830](https://patchblox.com/security/data/fix/linux/rhsa-2026-13830.md) | May 15, 2026 |
| Linux | dovecot-pigeonhole RHEL 9 | 1:2.3.16-18.el9_8 | [RHSA-2026:19364](https://patchblox.com/security/data/fix/linux/rhsa-2026-19364.md) | May 15, 2026 |
| Linux | dovecot-pigeonhole almalinux 10 | 1:2.3.21-19.el10_2 | [ALSA-2026:19149](https://patchblox.com/security/data/fix/linux/alsa-2026-19149.md) | May 19, 2026 |
| Linux | dovecot-pigeonhole almalinux 8 | 1:2.3.16-7.el8_10 | [ALSA-2026:13830](https://patchblox.com/security/data/fix/linux/alsa-2026-13830.md) | May 5, 2026 |
| Linux | dovecot-pigeonhole almalinux 9 | 1:2.3.16-18.el9_8 | [ALSA-2026:19364](https://patchblox.com/security/data/fix/linux/alsa-2026-19364.md) | May 19, 2026 |
| Linux | dovecot-pigeonhole amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-pigeonhole ol 10 | 1:2.3.21-16.el10_1.1 | [ELSA-2026-13498](https://patchblox.com/security/data/fix/linux/elsa-2026-13498.md) | May 5, 2026 |
| Linux | dovecot-pigeonhole ol 8 | 1:2.3.16-7.el8_10 | [ELSA-2026-13830](https://patchblox.com/security/data/fix/linux/elsa-2026-13830.md) | May 6, 2026 |
| Linux | dovecot-pigeonhole ol 9 | 1:2.3.16-15.el9_7.1 | [ELSA-2026-13857](https://patchblox.com/security/data/fix/linux/elsa-2026-13857.md) | May 6, 2026 |
| Linux | dovecot-pigeonhole-debuginfo amzn 2023 | 1:2.3.20-1.amzn2023.0.3 | [ALAS2023-2026-1570](https://patchblox.com/security/data/fix/linux/alas2023-2026-1570.md) | Apr 13, 2026 |
| Linux | dovecot-pop3d Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-pop3d 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-pop3d-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-pop3d Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-pop3d 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-pop3d-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-pop3d Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-pop3d 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-pop3d-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-sieve Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-sieve 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-sieve-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-sieve Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-sieve 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-sieve-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-sieve Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-sieve 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-sieve-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-solr Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-solr 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-solr-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-solr Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-solr 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-solr-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-solr Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-solr 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-solr-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-sqlite Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-sqlite 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-sqlite-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-sqlite Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-sqlite 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-sqlite-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-sqlite Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-sqlite 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-sqlite-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot-submissiond Ubuntu 22.04.1 LTS (jammy) | 1:2.3.16+dfsg1-3ubuntu2.7 | [dovecot-submissiond 1:2.3.16+dfsg1-3ubuntu2.7](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dovecot-submissiond-1-2.3.16-dfsg1-3ubuntu2.7.md) | Apr 15, 2026 |
| Linux | dovecot-submissiond Ubuntu 24.04.5 LTS (noble) | 1:2.3.21+dfsg1-2ubuntu6.3 | [dovecot-submissiond 1:2.3.21+dfsg1-2ubuntu6.3](https://patchblox.com/security/data/fix/linux/ubuntu-noble-dovecot-submissiond-1-2.3.21-dfsg1-2ubuntu6.3.md) | Apr 15, 2026 |
| Linux | dovecot-submissiond Ubuntu 25.10 (questing) | 1:2.4.1+dfsg1-5ubuntu4.1 | [dovecot-submissiond 1:2.4.1+dfsg1-5ubuntu4.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-dovecot-submissiond-1-2.4.1-dfsg1-5ubuntu4.1.md) | Apr 15, 2026 |
| Linux | dovecot23 sles 15.6 | 2.3.21.1-150200.76.1 | [SUSE-SU-2026:4139-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4139-1.md) | Sep 14, 2026 |
| Linux | dovecot23 sles 15.7 | 2.3.21.1-150200.76.1 | [SUSE-SU-2026:4139-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4139-1.md) | Sep 14, 2026 |
| Linux | dovecot24 opensuse-leap 16.0 | 2.4.3-160000.1.1 | [OPENSUSE-SU-2026:20554-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20554-1.md) | Apr 16, 2026 |
| Linux | dovecot24 sles 16.0 | 2.4.3-160000.1.1 | [SUSE-SU-2026:21208-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-21208-1.md) | Apr 16, 2026 |

---

Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.