CVE-2024-22365

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-02-06 · updated 2026-10-15
Weakness: CWE-664

Description

linux-pam (aka Linux PAM) before 1.6.0 allows attackers to cause a denial of service (blocked login process) via mkfifo because the openat call (for protect_dir) lacks O_DIRECTORY.

Affected products

Linux-PAM: before 1.6.0 — fixed in 1.6.0

How to fix

Upgrade to a fixed version: Linux-PAM 1.6.0. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2024/01/18/3
https://github.com/linux-pam/linux-pam
https://github.com/linux-pam/linux-pam/commit/031bb5a5d0d950253b68138b498dc93be69a64cb
https://github.com/linux-pam/linux-pam/releases/tag/v1.6.0
http://www.openwall.com/lists/oss-security/2024/01/18/3
https://github.com/linux-pam/linux-pam
https://github.com/linux-pam/linux-pam/commit/031bb5a5d0d950253b68138b498dc93be69a64cb
https://github.com/linux-pam/linux-pam/releases/tag/v1.6.0
https://lists.debian.org/debian-lts-announce/2025/09/msg00021.html
https://cert-portal.siemens.com/productcert/html/ssa-577017.html
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

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