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Medium severity5.3NVD Advisory· Published Mar 26, 2021· Updated Jun 17, 2026

CVE-2020-25578

CVE-2020-25578

Description

In FreeBSD 12.2-STABLE before r368969, 11.4-STABLE before r369047, 12.2-RELEASE before p3, 12.1-RELEASE before p13 and 11.4-RELEASE before p7 several file systems were not properly initializing the d_off field of the dirent structures returned by VOP_READDIR. In particular, tmpfs(5), smbfs(5), autofs(5) and mqueuefs(5) were failing to do so. As a result, eight uninitialized kernel stack bytes may be leaked to userspace by these file systems.

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

Affected products

25
  • FreeBSD/FreeBSD24 versions
    cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*+ 23 more
    • cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*
    • 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:p6:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p10:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p11:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p12:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p5:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p6:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p7:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p8:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:12.1:p9:*:*:*:*:*:*
    • 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:*:*:*:*:*:*
    • (no CPE)range: <12.2-STABLE r368969, <11.4-STABLE r369047, <12.2-RELEASE p3, <12.1-RELEASE p13, <11.4-RELEASE p7
  • FreeBSD/FreeBSDdescription

Patches

Vulnerability mechanics

References

2

News mentions

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