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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- http://www.openwall.com/lists/oss-security/2024/01/18/3 Exploit, Mailing List, Patch, Release Notes
- https://github.com/linux-pam/linux-pam/commit/031bb5a5d0d950253b68138b498dc93be69a64cb Patch
- http://www.openwall.com/lists/oss-security/2024/01/18/3 Exploit, Mailing List, Patch, Release Notes
- https://github.com/linux-pam/linux-pam/commit/031bb5a5d0d950253b68138b498dc93be69a64cb Patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · linux-pamNVD modified 2026-10-15 01:17
Affected (CPE criteria) 1
cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:*
References 11
- http://www.openwall.com/lists/oss-security/2024/01/18/3 Exploit, Mailing List, Patch, Release Notes
- https://github.com/linux-pam/linux-pam Product
- https://github.com/linux-pam/linux-pam/commit/031bb5a5d0d950253b68138b498dc93be69a64cb Patch
- https://github.com/linux-pam/linux-pam/releases/tag/v1.6.0 Release Notes
- http://www.openwall.com/lists/oss-security/2024/01/18/3 Exploit, Mailing List, Patch, Release Notes
- https://github.com/linux-pam/linux-pam Product
- https://github.com/linux-pam/linux-pam/commit/031bb5a5d0d950253b68138b498dc93be69a64cb Patch
- https://github.com/linux-pam/linux-pam/releases/tag/v1.6.0 Release Notes
- 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