# CVE-2021-4091: 389-ds-base: 389 Directory Server is an LDAP version 3 (LDAPv3) compliant server CVE-2021-4091 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2021-4091, released February 18, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2021-4091 - Priority: High - CVSS: 7.5 (Low) - EPSS: 0.0201 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Feb 18, 2022 ## Description 389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. Security Fix(es): * 389-ds-base: double free of the virtual attribute context in persistent search (CVE-2021-4091) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * Paged search lookthroughlimit counter doesnt take read ahead into account (BZ#2059893) * Based on 1944494 (RFC 4530 entryUUID attribute) - plugin entryuuid failing (BZ#2060106) ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | 389-ds-base Debian 12.15 (bookworm) | 2.0.15-1 | [DEBIAN-CVE-2021-4091](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4091.md) | Feb 18, 2022 | | Linux | 389-ds-base Debian 13.5 (trixie) | 2.0.15-1 | [DEBIAN-CVE-2021-4091](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4091.md) | Feb 18, 2022 | | Linux | 389-ds-base RHEL 8 | 0:1.4.3.23-14.module+el8.5.0+14377+c731dc97 | [RHSA-2022:0889](https://patchblox.com/security/data/fix/linux/rhsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base almalinux 8 | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | [ALSA-2022:0889](https://patchblox.com/security/data/fix/linux/alsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base ol 8 | 0:1.4.3.23-14.module+el8.5.0+20517+748852bc | [ELSA-2022-0889](https://patchblox.com/security/data/fix/linux/elsa-2022-0889.md) | Mar 16, 2022 | | Linux | 389-ds-base rocky 8 | 0:1.4.3.23-14.module+el8.5.0+745+c5be6847 | [RLSA-2022:0889](https://patchblox.com/security/data/fix/linux/rlsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-devel RHEL 8 | 0:1.4.3.23-14.module+el8.5.0+14377+c731dc97 | [RHSA-2022:0889](https://patchblox.com/security/data/fix/linux/rhsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-devel almalinux 8 | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | [ALSA-2022:0889](https://patchblox.com/security/data/fix/linux/alsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-devel ol 8 | 0:1.4.3.23-14.module+el8.5.0+20517+748852bc | [ELSA-2022-0889](https://patchblox.com/security/data/fix/linux/elsa-2022-0889.md) | Mar 16, 2022 | | Linux | 389-ds-base-legacy-tools RHEL 8 | 0:1.4.3.23-14.module+el8.5.0+14377+c731dc97 | [RHSA-2022:0889](https://patchblox.com/security/data/fix/linux/rhsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-legacy-tools almalinux 8 | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | [ALSA-2022:0889](https://patchblox.com/security/data/fix/linux/alsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-legacy-tools ol 8 | 0:1.4.3.23-14.module+el8.5.0+20517+748852bc | [ELSA-2022-0889](https://patchblox.com/security/data/fix/linux/elsa-2022-0889.md) | Mar 16, 2022 | | Linux | 389-ds-base-libs RHEL 8 | 0:1.4.3.23-14.module+el8.5.0+14377+c731dc97 | [RHSA-2022:0889](https://patchblox.com/security/data/fix/linux/rhsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-libs almalinux 8 | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | [ALSA-2022:0889](https://patchblox.com/security/data/fix/linux/alsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-libs ol 8 | 0:1.4.3.23-14.module+el8.5.0+20517+748852bc | [ELSA-2022-0889](https://patchblox.com/security/data/fix/linux/elsa-2022-0889.md) | Mar 16, 2022 | | Linux | 389-ds-base-snmp RHEL 8 | 0:1.4.3.23-14.module+el8.5.0+14377+c731dc97 | [RHSA-2022:0889](https://patchblox.com/security/data/fix/linux/rhsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-snmp almalinux 8 | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | [ALSA-2022:0889](https://patchblox.com/security/data/fix/linux/alsa-2022-0889.md) | Mar 15, 2022 | | Linux | 389-ds-base-snmp ol 8 | 0:1.4.3.23-14.module+el8.5.0+20517+748852bc | [ELSA-2022-0889](https://patchblox.com/security/data/fix/linux/elsa-2022-0889.md) | Mar 16, 2022 | | Linux | python3-lib389 RHEL 8 | 0:1.4.3.23-14.module+el8.5.0+14377+c731dc97 | [RHSA-2022:0889](https://patchblox.com/security/data/fix/linux/rhsa-2022-0889.md) | Mar 15, 2022 | | Linux | python3-lib389 almalinux 8 | 1.4.3.23-14.module_el8.5.0+2628+c731dc97 | [ALSA-2022:0889](https://patchblox.com/security/data/fix/linux/alsa-2022-0889.md) | Mar 15, 2022 | | Linux | python3-lib389 ol 8 | 0:1.4.3.23-14.module+el8.5.0+20517+748852bc | [ELSA-2022-0889](https://patchblox.com/security/data/fix/linux/elsa-2022-0889.md) | Mar 16, 2022 | --- Data as of 2026-11-08T00:53:09Z 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.