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CVE

CVE-2026-63922

ipv6: exthdrs: refresh nh after handling HAO option
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CVE

CVE-2026-63922

ipv6: exthdrs: refresh nh after handling HAO option

In the Linux kernel, the following vulnerability has been resolved:

ipv6: exthdrs: refresh nh after handling HAO option

ip6parsetlv() caches skbnetworkheader(skb) in nh while walking

IPv6 TLVs.

ipv6desthao() may call pskbexpandhead() for a cloned skb, which can

move the skb head and invalidate the cached network header pointer.

Refresh nh after ipv6desthao() returns so any trailing padding or TLVs

are parsed from the current skb head.

This matches the existing pattern used in ip6parsetlv() after helpers

that can modify skb header storage.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/12d957979e4a800167842f1b42be6a606d227ebe, https://git.kernel.org/stable/c/1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1, https://git.kernel.org/stable/c/751db1b802a067b7fff25880f4e9f9152a171538, https://git.kernel.org/stable/c/9b6dcc0a39fd71752937f0b6b3973e1416085dcf, https://git.kernel.org/stable/c/b3ac54e5c905f86d22b502eacb5686a282c5659f, https://git.kernel.org/stable/c/f7b52afe3592eae66e160586b45a3f2242972c63, https://git.kernel.org/stable/c/f8aabed3ff3e986920cf02a2a2785e08e586b234, https://git.kernel.org/stable/c/ff375ed1cba81392346c5bfbf0bb7a13b2946f99, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63922.json, https://nvd.nist.gov/vuln/detail/CVE-2026-63922, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00714%
EPSS Percentile
0.50944%
Introduced Version
a831f5bbc89a9978795504be9e1ff412043f8f77,2.6.19,5.11.0,5.16.0,6.2.0,6.7.0,6.13.0,6.19.0,0
Fix Available
f7b52afe3592eae66e160586b45a3f2242972c63,5.10.259,5.15.210,6.1.176,6.6.143,6.12.93,6.18.35,7.0.12,6.1.176-1,6.12.94-1,7.0.0-28.28~24.04.1,7.0.0-1016.16~24.04.1,7.0.0-28.28.1~24.04.3,0:5.15.0-323.211.3.3.el8uek,0:6.12.0-206.104.3.3.el9uek,0:5.15.0-323.211.3.3.el9uek,0:6.12.0-206.104.3.3.el10uek,1:6.18.35-68.127.amzn2023,1:1.0-0.amzn2023,1:6.1.176-220.358.amzn2023,1:6.12.94-123.174.amzn2023,0:5.10.259-258.1043.amzn2,0:1.0-0.amzn2,0:5.15.210-148.245.amzn2

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