SB20260828151 - Double free in Linux kernel pci msi driver
Published: August 28, 2026
Security Bulletin ID
SB20260828151
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Double free (CVE-ID: CVE-2026-80620)
CWE-ID: CWE-415 - Double Free
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f
- https://git.kernel.org/stable/c/3691a82be2095abaf3326a1cbf7b25858a1d959c
- https://git.kernel.org/stable/c/6848ca381edff84f87dd1b6973848c271541e813
- https://git.kernel.org/stable/c/82e120a7dd566c476ba923d30e3fb78e8118a1dd
- https://git.kernel.org/stable/c/f64e03da0d83cb173743888bff4a7e61476a8fc2
- https://git.kernel.org/stable/c/f79519f636059b007d6abc91652f36dea4f54a20