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CVE-2026-63922

ipv6: exthdrs: refresh nh after handling HAO option PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: ipv6: exthdrs: refresh nh after handling HAO option ip6_parse_tlv() caches skb_network_header(skb) in nh while walking IPv6 TLVs. ipv6_dest_hao() may call pskb_expand_head() for a cloned skb, which can move the skb head and invalidate the cached network header pointer. Refresh nh after ipv6_dest_hao() returns so any trailing padding or TLVs are parsed from the current skb head. This matches the existing pattern used in ip6_parse_tlv() after helpers that can modify skb header storage.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected a831f5bbc89a9978795504be9e1ff412043f8f77 before b3ac54e5c905f86d22b502eacb5686a282c5659f; affected a831f5bbc89a9978795504be9e1ff412043f8f77 before f8aabed3ff3e986920cf02a2a2785e08e586b234; affected a831f5bbc89a9978795504be9e1ff412043f8f77 before 1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1; affected a831f5bbc89a9978795504be9e1ff412043f8f77 before 12d957979e4a800167842f1b42be6a606d227ebe; affected a831f5bbc89a9978795504be9e1ff412043f8f77 before ff375ed1cba81392346c5bfbf0bb7a13b2946f99; affected a831f5bbc89a9978795504be9e1ff412043f8f77 before 751db1b802a067b7fff25880f4e9f9152a171538; affected a831f5bbc89a9978795504be9e1ff412043f8f77 before 9b6dcc0a39fd71752937f0b6b3973e1416085dcf; affected a831f5bbc89a9978795504be9e1ff412043f8f77 before f7b52afe3592eae66e160586b45a3f2242972c63
Linux / Linuxaffected 2.6.19; unaffected 0 before 2.6.19; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.