CVE-2021-36085

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __verify_map_perm_classperms and hashtab_map).

Score

CVSS 3.1 3.3 Low

Status

Modified - cve@mitre.org

Published

2021-07-01

Last modified

2026-10-14

Weaknesses

CWE-416

Affected products

• Fedora (Fedoraproject)
• Selinux (Selinux Project)
• Ruggedcom Rox Mx5000 (Siemens)
• Ruggedcom Rox Mx5000re (Siemens)
• Ruggedcom Rox Rx1400 (Siemens)
• Ruggedcom Rox Rx1500 (Siemens)
• Ruggedcom Rox Rx1501 (Siemens)
• Ruggedcom Rox Rx1510 (Siemens)
• Ruggedcom Rox Rx1511 (Siemens)
• Ruggedcom Rox Rx1512 (Siemens)
• Ruggedcom Rox Rx1524 (Siemens)
• Ruggedcom Rox Rx1536 (Siemens)
• Ruggedcom Rox Rx5000 (Siemens)
• Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
• Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
• Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)

References

• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.yaml
• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124
• https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f8663e8a6cba
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCK…
• https://security.netapp.com/advisory/ntap-20250207-0004/
• https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html
• https://cert-portal.siemens.com/productcert/html/ssa-202008.html