SB20260812353 - Use-after-free in Linux kernel misc mei driver
Published: August 12, 2026
Security Bulletin ID
SB20260812353
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-2026-68181)
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 use-after-free in mei_cl_bus_dev_release() in the MEI bus driver when cleaning up a MEI client bus device. A local user can trigger concurrent cleanup access to cause a denial of service.
The issue involves queue cleanup running without the device lock and traversal of file_list after releasing the final bus reference.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/441559d4c595f839b39f0ab6a4ae628427c2fd9e
- https://git.kernel.org/stable/c/59dd34854202d9a3faaa87a85205e553fe7150e1
- https://git.kernel.org/stable/c/7cf79e8d682fe93777268f029668ce5e214237fd
- https://git.kernel.org/stable/c/c88c030a324c9018b77894a19b2564eb66862020
- https://git.kernel.org/stable/c/f112ea910e554d58b4b39a4492b7d302f0f4204f