Main Vulnerability Database Vulnerabilities #VU146251

Double free in Linux kernel - CVE-2026-80620

Published: August 28, 2026

Vulnerability identifier: #VU146251

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-2026-80620

CWE-ID: CWE-415

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 double unmap of memory in msix_capability_init() in the PCI/MSI subsystem when handling an error after msix_setup_interrupts() fails. A local user can trigger MSI-X initialization failure to cause a denial of service.

The issue is reachable during MSI-X setup on affected systems.

Affected software

Linux kernel

How to mitigate CVE-2026-80620

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3

External References

Related Security Bulletins