Main Vulnerability Database Vulnerabilities #VU141028

Use-after-free in Linux kernel - CVE-2026-64574

Published: August 6, 2026

Vulnerability identifier: #VU141028

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-2026-64574

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 ieee80211_if_read_link and related mac80211 link handling when reading debugfs link files after a vif link update error path leaves stale debugfs entries for newly added links. A local user can open and read a debugfs link file referencing freed memory to cause a denial of service.

The issue is triggered when drv_change_vif_links() fails after new links have been allocated and initialized.

Affected software

Linux kernel

How to mitigate CVE-2026-64574

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3

External References

Related Security Bulletins