What is CVE-2026-63922?

CVE-2026-63922 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 2.6.19 onward and patched in 5.15.210, 6.1.176, 6.6.143 and others. CVE-2026-63922 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-63922?

CVE-2026-63922 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-63922?

Yes, CVE-2026-63922 has been patched. Fixed versions include 5.15.210, 6.1.176, 6.6.143 and others. If you are running Linux kernel 2.6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-63922 actively exploited?

CVE-2026-63922 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

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.

Package Linux Kernel

Published 2026-07-19

Last modified 2026-07-19

Patch available

Yes

Affected versions

Linux kernel versions 2.6.19 and later are affected. Fixed in 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12, 7.1 and their respective stable series.

Affected from

≥ 2.6.19

Fixed in

✓ 5.15.210 5.15.x ✓ 6.1.176 6.1.x ✓ 6.6.143 6.6.x ✓ 6.12.93 6.12.x ✓ 6.18.35 6.18.x ✓ 7.0.12 7.0.x ✓ 7.1

References

7 total

Showing 5 of 7 references View all on NVD

Frequently asked questions

What is CVE-2026-63922?

CVE-2026-63922 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.19 onward and has been patched in 5.15.210, 6.1.176, 6.6.143 and others. CVE-2026-63922 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-63922?

Yes — CVE-2026-63922 has been patched. Fixed versions include 5.15.210, 6.1.176, 6.6.143 and others. If you are running Linux kernel 2.6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-63922 actively exploited?

No — CVE-2026-63922 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.