CVE-2026-63912: xfrm: esp: restore combined single-frag length gate
Published Jul 19, 2026
·Updated
In the Linux kernel, the following vulnerability has been resolved:
Affected Software
2 affected componentsFixes available
Linux Linux kernel
debian/linux
6.1.176-16.1.187-16.12.107-16.12.111-17.2.8-17.2.9-1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.187-1Fixed in 6.12.107-1Fixed in 6.12.111-1Fixed in 7.2.8-1Fixed in 7.2.9-1
Event History
Jul 19, 2026
CVE Published
via MITRE·02:55 PM
Data Sourced
via MITRE·02:55 PM
DescriptionSeverity
Data Sourced
via NVD·04:17 PM
DescriptionSeverity
Sep 24, 2026
Data Sourced
via Launchpad·04:08 PM
Description
Oct 4, 2026
Data Sourced
via Debian·04:15 PM
DescriptionAffected Software
Oct 6, 2026
Data Sourced
via Ubuntu·04:16 PM
RemedyDescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-63912?
CVE-2026-63912 has a critical severity rating of 9.8.
2
What are the potential impacts of CVE-2026-63912?
CVE-2026-63912 may lead to remote code execution due to improper handling of ESP packets.
3
How do I fix CVE-2026-63912?
To fix CVE-2026-63912, update the Linux kernel to the latest version that addresses this vulnerability.
4
Which versions of the Linux kernel are affected by CVE-2026-63912?
CVE-2026-63912 affects versions of the Linux kernel prior to the patch released on July 20, 2026.
5
Is CVE-2026-63912 exploitable remotely?
Yes, CVE-2026-63912 is exploitable remotely given its access vector is categorized as AV:N.