SB20260816100 - Use-after-free in Linux kernel kvm
Published: August 16, 2026
Security Bulletin ID
SB20260816100
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) Use-after-free (CVE-ID: CVE-2026-72282)
CWE-ID: CWE-416 - Use After 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 use-after-free in kvm_io_bus_get_dev() and vgic_msi_to_its() when processing KVM MMIO bus device lookups for MSI addresses. A local user can trigger access to a matched device after the srcu lock has been dropped to cause a denial of service.
The issue occurs when the returned device matches only by address and is not the expected device type.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0cbae0e296d27ce4c4cce83e34d40c2bfd8133aa
- https://git.kernel.org/stable/c/1b4a3c2f0509e7b0e65667f3c36676a849ee2755
- https://git.kernel.org/stable/c/3a07249981629ace483ebbef81ef6b34c2d2afec
- https://git.kernel.org/stable/c/7099e7148f81c605bbc319b16ce0131540341560
- https://git.kernel.org/stable/c/90d35d2b8e47afd68fe2a4dd0eeb60bc71641775
- https://git.kernel.org/stable/c/cfe107b02a3c3f049e0dc15b6a36625f048eda2a
- https://git.kernel.org/stable/c/e01071ea006c9b952125ed8b0cc90ac7bd356cce
- https://git.kernel.org/stable/c/f398b7d92cd999191249830b9171c9bd787a9a91