CVE-2026-11793

MEDIUM

389-ds-base: 389-ds-base: stack buffer overflow in checkprefix() algorithm id parsing

Title source: cna

Description

A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.

References (3)

Core 3

Core References

Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat

https://access.redhat.com/security/cve/CVE-2026-11793

Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat

RHBZ#2484914

https://bugzilla.redhat.com/show_bug.cgi?id=2484914

https://redhat.atlassian.net/browse/PSIRTSUPT-7600

Scores

CVSS v3 4.9

EPSS 0.0035

EPSS Percentile 26.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-121

Status published

Products (9)

Red Hat/Red Hat Directory Server 11

Red Hat/Red Hat Directory Server 12

Red Hat/Red Hat Directory Server 13

Red Hat/Red Hat Enterprise Linux 10

Red Hat/Red Hat Enterprise Linux 6

Red Hat/Red Hat Enterprise Linux 7

Red Hat/Red Hat Enterprise Linux 8

Red Hat/Red Hat Enterprise Linux 9

redhat/389_directory_server

Published Jun 09, 2026

Tracked Since Jun 09, 2026