SB20260325104 - Integer overflow in Linux kernel core

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Main Vulnerability Database SB20260325104

SB20260325104 - Integer overflow in Linux kernel core

Published: March 25, 2026

Security Bulletin ID SB20260325104
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Integer overflow (CVE-ID: CVE-2026-23343)

The vulnerability allows a local user to execute arbitrary code or cause a denial of service due to memory corruption.

The vulnerability exists due to improper input validation in the XDP (eXpress Data Path) subsystem when handling packet tailroom calculations. A local user can trigger a negative tailroom value that is interpreted as a large unsigned integer, leading to out-of-bounds memory access during XDP frame processing.

The issue arises when Ethernet drivers report fragment sizes smaller than the actual truesize, causing incorrect tailroom computation in functions such as bpf_xdp_frags_increase_tail().


Remediation

Install update from vendor's website.

References