SB20260928340 - Out-of-bounds write in Linux kernel ipv4

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-97602)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to an out-of-bounds write caused by stale reassembly metadata in IPv6 fragment reassembly when processing IPv6 fragments after fragment queue teardown. A local user can send crafted IPv6 fragments to escalate privileges.

Exploitation requires unprivileged network namespaces to be available.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/7cb5f4643a7fcdbfbee1fad3cdfc678add62d378
• https://git.kernel.org/stable/c/b824476c56a153934c67c9e0f873e1fd967743d6
• https://git.kernel.org/stable/c/b9d77f1652e79e58eac48430d0431c329137efcc
• https://git.kernel.org/stable/c/bf3d6c44c84c57e8a4bb7f40ad95b64f9b0198ba