Strix
26.1K

CVE-2026-63922

CRITICALCVSS 9.8/10EPSS 0.68%

Last modified

CVE-2026-63922 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.68%

48.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= a831f5bbc89a9978795504be9e1ff412043f8f77, < b3ac54e5c905f86d22b502eacb5686a282c5659f; >= a831f5bbc89a9978795504be9e1ff412043f8f77, < f8aabed3ff3e986920cf02a2a2785e08e586b234; >= a831f5bbc89a9978795504be9e1ff412043f8f77, < 1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1; >= a831f5bbc89a9978795504be9e1ff412043f8f77, < 12d957979e4a800167842f1b42be6a606d227ebe; >= a831f5bbc89a9978795504be9e1ff412043f8f77, < ff375ed1cba81392346c5bfbf0bb7a13b2946f99; >= a831f5bbc89a9978795504be9e1ff412043f8f77, < 751db1b802a067b7fff25880f4e9f9152a171538; >= a831f5bbc89a9978795504be9e1ff412043f8f77, < 9b6dcc0a39fd71752937f0b6b3973e1416085dcf; >= a831f5bbc89a9978795504be9e1ff412043f8f77, < f7b52afe3592eae66e160586b45a3f2242972c63
LinuxLinux2.6.19

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-63922?
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.
How severe is CVE-2026-63922?
CVE-2026-63922 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.
How do I fix CVE-2026-63922?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-63922?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST