Use-after-free in Linux kernel - CVE-2026-89922
Published: September 17, 2026
Vulnerability identifier: #VU150361
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-2026-89922
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to improper synchronization in __import_wp_info() when importing watchpoint data during a concurrent memslot update. A local user can initiate watchpoint data import while a concurrent memslot update occurs to disclose sensitive information, modify data, or cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89922
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/4c05bf21d1806853e662cc19e744736a3408f155
- https://git.kernel.org/stable/c/6830fbc3724bf49c142aae69a4694f115fa9cedd
- https://git.kernel.org/stable/c/76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03
- https://git.kernel.org/stable/c/a4e482def8533ebace517d9f67f1465841b1f982
- https://git.kernel.org/stable/c/cc710ee45395efb4937e042960f791d33924e5f6
- https://git.kernel.org/stable/c/f8e3a9997d5ecd56ebe4b262ff424516c068fecb