CVE-2021-36087

Published: Jul 1, 2021

Modified: Nov 3, 2025

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml

x_refsource_MISC

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675

x_refsource_MISC

https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/

x_refsource_MISC

https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521

x_refsource_MISC

FEDORA-2021-67efe88c29

vendor-advisory

x_refsource_FEDORA

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CVE-2021-36087

Description

Affected Products

References