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Low 3.3Published Jul 1, 2021
CVE-2021-36085The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __verify_map_perm_classperms and hashtab_map).
Updated under an hour ago ()
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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 15 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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).
- CVSS
- 3.3 LOW (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens RUGGEDCOM ROX MX5000 siemens:ruggedcom_rox_mx5000 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX MX5000RE siemens:ruggedcom_rox_mx5000re (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1400 siemens:ruggedcom_rox_rx1400 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1500 siemens:ruggedcom_rox_rx1500 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1501 siemens:ruggedcom_rox_rx1501 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1510 siemens:ruggedcom_rox_rx1510 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1511 siemens:ruggedcom_rox_rx1511 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1512 siemens:ruggedcom_rox_rx1512 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1524 siemens:ruggedcom_rox_rx1524 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1536 siemens:ruggedcom_rox_rx1536 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX5000 siemens:ruggedcom_rox_rx5000 (from the name) | before V2.17.0 | CISA ADP |
selinux_project selinux selinux_project:selinux | 3.2 | NVD |
fedoraproject fedora fedoraproject:fedora | 35 | NVD |
References
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-421.yamlx-refsource-misc, third-party-advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31124x-refsource-misc, exploit, issue-tracking, patch, third-party-advisory
- https://github.com/SELinuxProject/selinux/commit/2d35fcc7e9e976a2346b1de20e54f8663e8a6cbax-refsource-misc, patch, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/vendor-advisory, x-refsource-fedora
- https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
- https://security.netapp.com/advisory/ntap-20250207-0004/
- https://cert-portal.siemens.com/productcert/html/ssa-202008.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.