SB2026082895 - NULL pointer dereference in Linux kernel s390 kvm
Published: August 28, 2026
Security Bulletin ID
SB2026082895
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) NULL pointer dereference (CVE-ID: CVE-2026-80684)
CWE-ID: CWE-476 - NULL Pointer Dereference
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 NULL pointer dereference in arch/s390/kvm/pci.c when enabling adapter interruption forwarding for a PCI device after AIBV allocation fails. A local user can trigger the vulnerable code path to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0a95abe964400771ad82b027d7b84a0d183cd0db
- https://git.kernel.org/stable/c/8bf09b9b7d3232806df95f409581f8a9fd99a3fa
- https://git.kernel.org/stable/c/96099486b63985801c9c6ef22505e9aa635b2d20
- https://git.kernel.org/stable/c/d1a103dc9016c25e7423ce5841a5cc2df76d59f3
- https://git.kernel.org/stable/c/df947d85e164a50a29d43a96e814f69ab1d0f7ed
- https://git.kernel.org/stable/c/e137d082325bbcae780087b57501d38585e625d9