Race condition in Linux kernel - CVE-2026-89997
Published: September 16, 2026
Vulnerability identifier: #VU150298
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-2026-89997
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a use-after-free condition.
The vulnerability exists due to a race condition in the device-mapper resume and remove handling when issuing resume and remove ioctls concurrently. A local user can issue resume and remove ioctls concurrently to cause a use-after-free condition.
In the dm-integrity target, the reboot notifier can remain registered after device removal.
Affected software
Linux kernel
How to mitigate CVE-2026-89997
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/1ede2bce2bd640605df83db1356fd727159bc9ed
- https://git.kernel.org/stable/c/36177beff2a9df035991ad8d16ccf8d363ed93ee
- https://git.kernel.org/stable/c/3b59530b14fde693e41d8e39bc326df6cbf07b76
- https://git.kernel.org/stable/c/3f04e6520d9a53adb1d1daf4dc5d31a60fc77d1f
- https://git.kernel.org/stable/c/44b43ec132f1cf3275ecc182d0c82f50c3c4c3d5
- https://git.kernel.org/stable/c/94380ecd5ff9b2a2b9f6e8a0b5c465159ccfaf71
- https://git.kernel.org/stable/c/94f3d399c1ddba763c1c5a6501f7375d533d789f
- https://git.kernel.org/stable/c/9757367bcf1d5d2c50b94d005abca21f3eedd7c3