Linux · SUSE Linux Enterprise · Security advisory · September 1, 2026
SUSE-SU-2026:23595-1: dovecot24 security update
SUSE-SU-2026:23595-1, released September 1, 2026, fixes 24 CVEs in dovecot24 (version 2.4.4-160000.2.1). None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
24
None rated Critical
Exploited
0
None reported
Highest CVSS
9.1
Base score, 0 to 10
Highest EPSS
0.0087
59th percentile
Priority of the 24 CVEs
Patch now 0
Urgent 0
High 7
Routine 17
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| dovecot24 | sles 16.0 | 2.4.4-160000.2.1 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2026-33263 | dovecot: When mail_max_userip_connections is set (default 10) and reached, submission-login can crash with epoll() panic cause... | 9.1 | 0.0055 | None reported |
| High | CVE-2026-33605 | dovecot: An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authe... | 9.1 | 0.0045 | None reported |
| High | CVE-2026-42391 | dovecot: An unauthenticated attacker can send an IMAP ID command with a very large number of parameters before logging in, whi... | 9.1 | 0.0045 | None reported |
| High | CVE-2026-27852 | dovecot23: DoS by sending mail with bad header (bsc#1276799). | 9.1 | 0.0043 | None reported |
| High | CVE-2026-42007 | dovecot: An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-fr... | 9.1 | 0.0035 | None reported |
| High | CVE-2026-40018 | dovecot: None None None No publicly available exploits are known. | 9.1 | 0.0032 | None reported |
| High | CVE-2026-73208 | dovecot: An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token respon... | 9.1 | 0.0031 | None reported |
| Routine | CVE-2026-40013 | dovecot: An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes... | 4.3 | 0.0087 | None reported |
| Routine | CVE-2026-33607 | dovecot23: IMAP LIST match_sub() Exponential Backtracking -- CPU Denial of Service (bsc#1276795). | 4.3 | 0.0055 | None reported |
| Routine | CVE-2026-40015 | dovecot23: imap-hibernate can be crashed (bsc#1276812). | 4.3 | 0.0055 | None reported |
| Routine | CVE-2026-52687 | dovecot23: IMAP: COMPRESS ZSTD can cause excessive memory usage (bsc#1276837). | 6.5 | 0.0040 | None reported |
| Routine | CVE-2026-73209 | dovecot23: imap-login crash: Self-recursion on zero-output decompress chunks (bsc#1276833). | 6.5 | 0.0040 | None reported |
| Routine | CVE-2026-42395 | dovecot23: Single NUL-Byte XCLIENT FORWARD Payload Crashes (bsc#1276826). | 4.3 | 0.0035 | None reported |
| Routine | CVE-2026-40014 | dovecot23: CPU DoS via Crafted References Header (bsc#1276804). | 6.5 | 0.0033 | None reported |
| Routine | CVE-2026-40017 | dovecot: An attacker that can send mail to a user can craft a message header whose values are chosen to collide in an internal... | 6.5 | 0.0033 | None reported |
| Routine | CVE-2026-33604 | dovecot23: SMTP Smuggling via Missing Dot-Stuffing (bsc#1276802). | 5.9 | 0.0031 | None reported |
| Routine | CVE-2026-52681 | dovecot23: Sieve resource usage tracking lost when active script changes (bsc#1276828). | 3.1 | 0.0030 | None reported |
| Routine | CVE-2026-42392 | dovecot: An attacker that has valid credentials can send an invalid IMAP URLFETCH command, which causes uninitialized memory t... | 4.3 | 0.0027 | None reported |
| Routine | CVE-2026-40203 | dovecot23: IMAP Compression Can Reveal Whether a Small Synced Email Body Matches Sender-Chosen Text | 3.7 | 0.0026 | None reported |
| Routine | CVE-2026-33606 | dovecot23: dsync: Mail content can cause dsync protocol injection (bsc#1276800). | 4.8 | 0.0025 | None reported |
| Routine | CVE-2026-42008 | dovecot23: XCLIENT FORWARD= bare token not namespaced (bsc#1276824). | 4.3 | 0.0024 | None reported |
| Routine | CVE-2026-40205 | dovecot23: OAuth2 passdb scope enforcement bypass via OR semantics in remote validation path (bsc#1276820). | 5.9 | 0.0021 | None reported |
| Routine | CVE-2026-40204 | dovecot: None None None No publicly available exploits are known. | 3.1 | 0.0021 | None reported |
| Routine | CVE-2026-42393 | dovecot23: doveadm_password or api key length can still be leaked with timing comparisons (bsc#1276827). | 3.1 | 0.0017 | None reported |
Showing 1 to 24 of 24
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