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Vulnerability · Published Jul 1, 2021 · Assigned by mitre

CVE-2021-36087

Low 3.3

In plain English

A low-severity security flaw in the libsepol package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)3.3Low
Exploit odds (30 days)0.5%top 58.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8libsepol2.9-3.el8ALSA-2021:4513
AlmaLinux:8libsepol-devel2.9-3.el8ALSA-2021:4513
AlmaLinux:8libsepol-static2.9-3.el8ALSA-2021:4513
Debian:12libsepol3.3-1DEBIAN-CVE-2021-36087
Debian:13libsepol3.3-1DEBIAN-CVE-2021-36087
Debian:14libsepol3.3-1DEBIAN-CVE-2021-36087
Rocky Linux:8libsepol0:2.9-3.el8RLSA-2021:4513

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References