Race condition in Linux kernel - CVE-2026-80548
Published: August 27, 2026
Vulnerability identifier: #VU145943
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80548
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges and compromise confidentiality, integrity, and availability.
The vulnerability exists due to a race condition in the vfio_ccw I/O resource handling and channel program lifecycle management when processing concurrent I/O operations and state transitions. A local user can trigger concurrent operations to escalate privileges and compromise confidentiality, integrity, and availability.
The issue affects the s390 vfio_ccw driver.
Affected software
Linux kernel
How to mitigate CVE-2026-80548
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/2a5ac0c0f1f7da33929211a2e41911bf72ee35d8
- https://git.kernel.org/stable/c/2ba9efdf9ebedc4e54df4b56aa3b43a65f7967cd
- https://git.kernel.org/stable/c/34f4feff3e90bd09308fad0974e97113b23b812a
- https://git.kernel.org/stable/c/b6aecea4b2b246f9fbd98a5712daa1193a60818e
- https://git.kernel.org/stable/c/f72a51810d49411bd8cad0c2df8592320a2fe5cc