Race condition in Linux kernel - CVE-2026-93108
Published: September 18, 2026
Vulnerability identifier: #VU150897
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93108
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper synchronization in the IPoIB module teardown path when unloading the module while RCU callbacks remain pending. A local privileged user can initiate module teardown before queued RCU callbacks complete to cause a denial of service.
The condition can also occur after client registration failure removes already-added devices and queues callbacks.
Affected software
Linux kernel
How to mitigate CVE-2026-93108
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/24ce944721dcd92ae62e7a448d770e2a3e79f5fd
- https://git.kernel.org/stable/c/2b3330cfc097db2d31f47ad09261967630270d66
- https://git.kernel.org/stable/c/31b7c700670830a0e8a4cdcd451c88a13cc5dc48
- https://git.kernel.org/stable/c/4a6dc313f9661f80e4ed43461d7ed5615c2450ca
- https://git.kernel.org/stable/c/7bc08d7f9338c9f9c09965e5d020591c793a80cb
- https://git.kernel.org/stable/c/8dc5ffcb8efcc01e44dd1ebc490eaae72de3fadf
- https://git.kernel.org/stable/c/bb9c23733a0c50e136bd40c27cb60023cc58e22c
- https://git.kernel.org/stable/c/d8917353966d1d5a486437dd0dd68a2cf8ecb136