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Debian 11: PAM Important DoS and Access Risk CVE-2024-22365 DLA-4306-1

debian lts
Calendar Grey September 21, 2025
Dist Debian Esm H88
Uncover vital security patches for Debian LTS addressing PAM module flaws, highlighting risks of privilege escalation and denial-of-service vulnerabilities.
Multiple vulnerabilities were found in PAM namespace module used to configure private namespaces for user sessions
Topics%20covered

Topics Covered

security advisory debian access control DoS important PAM

Summary

CVE-2024-22365

An attackers can cause a denial of service
(blocked login process) via mkfifo because the
openat call (for protect_dir) lacks O_DIRECTORY.

CVE-2025-6020

pam_namespace may use access user-controlled paths
without proper protection, allowing local users to elevate
their privileges to root via multiple symlink attacks
and race conditions.

For Debian 11 bullseye, these problems have been fixed in version
1.4.0-9+deb11u2.

We recommend that you upgrade your pam packages.

For the detailed security status of pam please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/pam

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Severity
important
Lowest
Low
Medium
High
Critical

Package: pam
Version: 1.4.0-9+deb11u2
CVE ID: CVE-2024-22365 CVE-2025-6020
Debian Bug: 1061097 1107919

Topics%20covered

Topics Covered

security advisory debian access control DoS important PAM

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