SB20260831110 - Out-of-bounds write in Linux kernel core

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260831110

SB20260831110 - Out-of-bounds write in Linux kernel core

Published: August 31, 2026

Security Bulletin ID SB20260831110
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-80725)

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

CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause memory corruption.

The vulnerability exists due to an out-of-bounds write in skb_gro_receive() and IPv6 GRO completion handling when processing crafted packets for BIG TCP aggregation beyond 64KB. A local user can inject specially crafted frames to cause memory corruption.

Exploitation requires access to inject crafted frames through AF_PACKET, and the issue is limited to older stable branches rather than mainline 7.0 and later.


Remediation

Install update from vendor's website.

References