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Medium severity5.5NVD Advisory· Published Apr 7, 2021· Updated Jun 17, 2026

CVE-2021-29626

CVE-2021-29626

Description

In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r369551, 11.4-STABLE before r369559, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, copy-on-write logic failed to invalidate shared memory page mappings between multiple processes allowing an unprivileged process to maintain a mapping after it is freed, allowing the process to read private data belonging to other processes or the kernel.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

24
  • FreeBSD/FreeBSD23 versions
    cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*+ 22 more
    • cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*range: <11.4
    • cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:beta1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:p3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:p4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:p5:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:rc1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:rc2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.2:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.2:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.2:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:beta1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:beta2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:beta3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:beta4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:rc1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:rc2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:rc3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:rc4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:13.0:rc5:*:*:*:*:*:*
    • (no CPE)range: <13.0-STABLE n245117, <12.2-STABLE r369551, <11.4-STABLE r369559, <13.0-RC5 p1, <12.2-RELEASE p6, <11.4-RELEASE p9
  • FreeBSD/FreeBSDdescription

Patches

Vulnerability mechanics

References

2

News mentions

0

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