CVE-2026-63922ipv6: exthdrs: refresh nh after handling HAO option
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from a831f5bbc89a9978795504be9e1ff412043f8f77 before b3ac54e5c905f86d22b502eacb5686a282c5659f; from a831f5bbc89a9978795504be9e1ff412043f8f77 before f8aabed3ff3e986920cf02a2a2785e08e586b234; from a831f5bbc89a9978795504be9e1ff412043f8f77 before 1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1; from a831f5bbc89a9978795504be9e1ff412043f8f77 before 12d957979e4a800167842f1b42be6a606d227ebe; from a831f5bbc89a9978795504be9e1ff412043f8f77 before ff375ed1cba81392346c5bfbf0bb7a13b2946f99; from a831f5bbc89a9978795504be9e1ff412043f8f77 before 751db1b802a067b7fff25880f4e9f9152a171538; from a831f5bbc89a9978795504be9e1ff412043f8f77 before 9b6dcc0a39fd71752937f0b6b3973e1416085dcf; from a831f5bbc89a9978795504be9e1ff412043f8f77 before f7b52afe3592eae66e160586b45a3f2242972c63 | CNA record |
References
- https://git.kernel.org/stable/c/b3ac54e5c905f86d22b502eacb5686a282c5659f
- https://git.kernel.org/stable/c/f8aabed3ff3e986920cf02a2a2785e08e586b234
- https://git.kernel.org/stable/c/1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1
- https://git.kernel.org/stable/c/12d957979e4a800167842f1b42be6a606d227ebe
- https://git.kernel.org/stable/c/ff375ed1cba81392346c5bfbf0bb7a13b2946f99
- https://git.kernel.org/stable/c/751db1b802a067b7fff25880f4e9f9152a171538
- https://git.kernel.org/stable/c/9b6dcc0a39fd71752937f0b6b3973e1416085dcf
- https://git.kernel.org/stable/c/f7b52afe3592eae66e160586b45a3f2242972c63
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.