Main Vulnerability Database Vulnerabilities #VU143182

Use-after-free in Linux kernel - CVE-2026-72255

Published: August 16, 2026

Vulnerability identifier: #VU143182

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-72255

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free in nf_queue handling of bridge fake dst references when processing bridged packets queued to NFQUEUE. A local user can queue bridged packets to NFQUEUE during bridge device teardown to cause a denial of service.

The issue affects systems with CONFIG_BRIDGE_NETFILTER enabled and involves queued packets carrying a fake rtable associated with a bridge device.

Affected software

Linux kernel

How to mitigate CVE-2026-72255

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3

External References

Related Security Bulletins