SB2026062654 - Improper control of a resource through its lifetime in Linux kernel bridge netfilter

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Main Vulnerability Database SB2026062654

SB2026062654 - Improper control of a resource through its lifetime in Linux kernel bridge netfilter

Published: June 26, 2026

Security Bulletin ID SB2026062654
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-53266)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper memory handling in the ebtables SNAT target ARP sender hardware address rewrite in net/bridge/netfilter/ebt_snat.c when processing ARP packets in bridge netfilter hooks. A local user can trigger ARP sender hardware address rewriting on a crafted nonlinear skb to cause a denial of service.

Exploitation requires the ARP sender hardware address rewrite path to be reached with a nonlinear skb fragment backed by a splice-imported file page.


Remediation

Install update from vendor's website.

References