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Medium severity5.5NVD Advisory· Published Mar 26, 2021· Updated Jun 17, 2026

CVE-2020-7462

CVE-2020-7462

Description

In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.

AI Insight

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Affected products

15
  • FreeBSD/kernelllm-fuzzy
    Range: <11.4-PRERELEASE r360733, <11.3-RELEASE p13
  • FreeBSD/FreeBSD14 versions
    cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*+ 13 more
    • cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p10:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p11:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p12:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p7:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p8:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.3:p9:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

1

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