CVE-2026-11791
Fixed in a distro release EPSS <1%CVSS 5.0
A flaw was found in 389 Directory Server. During schema reload, the attr_syntax_swap_ht() function unconditionally frees attribute syntax information nodes, bypassing the refcount-based deferred deletion used elsewhere in the attribute syntax subsystem. If an administrator triggers schema reload while concurrent LDAP query traffic is active, worker threads may access freed memory, resulting in use-after-free or double-free and a denial of service (server crash).
Products: Red Hat Directory Server 11, Red Hat Directory Server 12, Red Hat Directory Server 13, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | 389-ds-base | no fix |
| Debian 13 | 389-ds-base | no fix |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | 389-ds | 2.2.10~git255.752643c78-150500.3.48.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | 389-ds | 2.2.10~git255.752643c78-150500.3.48.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | 389-ds | 2.7.0~git234.0afa2e38b-150700.3.22.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | 389-ds | 2.7.0~git212.9b0755edb-150700.3.19.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | 389-ds | 2.2.10~git255.752643c78-150500.3.48.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | 389-ds | 2.2.10~git255.752643c78-150600.8.32.1 |
| SUSE Linux Enterprise Server 16.0 | 389-ds | 3.0.6~git382.7a51ea5f5-160000.1.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | 389-ds | 2.2.10~git255.752643c78-150500.3.48.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | 389-ds | 2.2.10~git255.752643c78-150600.8.32.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | 389-ds | 3.0.6~git382.7a51ea5f5-160000.1.1 |
| Ubuntu 22.04 LTS | 389-ds-base | no fix |
| Ubuntu 24.04 LTS | 389-ds-base | no fix |
| Ubuntu 25.10 | 389-ds-base | no fix |
| Ubuntu 26.04 LTS | 389-ds-base | no fix |
| Ubuntu 26.10 | 389-ds-base | no fix |
| Ubuntu Pro 16.04 LTS | 389-ds-base | no fix |
| Ubuntu Pro 18.04 LTS | 389-ds-base | no fix |
| Ubuntu Pro 20.04 LTS | 389-ds-base | no fix |
| openSUSE Leap 16.0 | 389-ds | 3.0.6~git382.7a51ea5f5-160000.1.1 |
| openSUSE Tumbleweed | 389-ds | 3.2.2+4b41542b2-1.1 |