Low
Security advisory
The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-36086
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:45 UTC · Revision 1
Source evidence
The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).
osv:CVE-2021-36086
Complete source record
{
"id": "894544d9879ea63c6828baa7fa61749d5f5a31959cf309619ee9d04fb5f51af2",
"url": "https://osv.dev/vulnerability/CVE-2021-36086",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-36086",
"summary": "The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list).",
"evidence": "osv:CVE-2021-36086",
"products": [],
"severity": "low",
"structured": {
"id": "CVE-2021-36086",
"aliases": [
"CVE-2021-36086"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/selinuxproject/selinux",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "7f600c40bc18d8180993edcd54daf45124736776"
},
{
"fixed": "c49a8ea09501ad66e799ea41b8154b6770fec2c8"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:selinux_project:selinux:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.3"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "c49a8ea09501ad66e799ea41b8154b6770fec2c8"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-36086.json",
"vanir_signatures": [
{
"id": "CVE-2021-36086-06db8dc3",
"digest": {
"threshold": 0.9,
"line_hashes": [
"238834479780486971736228051238403053341",
"153800074891775518363529245327982065367",
"290747283680954031151721411311045337991",
"162766036174898142873097102429039450688"
]
},
"source": "https://github.com/selinuxproject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8",
"target": {
"file": "libsepol/cil/src/cil_reset_ast.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2021-36086-a7f133bc",
"digest": {
"length": 71,
"function_hash": "76894657754915092398298838715200092986"
},
"source": "https://github.com/selinuxproject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8",
"target": {
"file": "libsepol/cil/src/cil_reset_ast.c",
"function": "cil_reset_classperms_set"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T14:25:22Z"
}
}
],
"modified": "2026-10-20T14:25:22.704021478Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-202008.html",
"https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/",
"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-536.yaml",
"https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html",
"https://security.netapp.com/advisory/ntap-20250207-0004/",
"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32177",
"https://github.com/SELinuxProject/selinux/commit/c49a8ea09501ad66e799ea41b8154b6770fec2c8"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "11.0"
},
{
"last_affected": "11.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "35"
},
{
"last_affected": "35"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-36086",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388977,
"published_at": "2021-07-01T03:15:08.783+00:00"
}