Double Free Affecting 389-ds-base package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.43% (36th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-389DSBASE-18751747
  • published13 Aug 2026
  • disclosed12 Aug 2026

Introduced: 12 Aug 2026

NewCVE-2026-18663  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable 389-ds-base.

NVD Description

Note: Versions mentioned in the description apply only to the upstream 389-ds-base package and not the 389-ds-base package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function frees the parsed controls array on the Session Tracking critical-control rejection path without clearing the SLAPI_REQCONTROLS pblock slot. Operation teardown then frees the same pointer again, causing a double-free. An unauthenticated remote attacker can trigger this with a single BIND request carrying a critical Session Tracking control, resulting in heap corruption and potential denial of service.

CVSS Base Scores

version 3.1