#VU117745 Improper locking in Linux kernel - CVE-2025-40027
Published: October 28, 2025
Vulnerability identifier: #VU117745
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2025-40027
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the p9_fd_cancelled() function in net/9p/trans_fd.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.
External links
- https://git.kernel.org/stable/c/0e0097005abc02c9f262370674f855625f4f3fb4
- https://git.kernel.org/stable/c/284e67a93b8c48952b6fc82129a8d3eb9dc73b06
- https://git.kernel.org/stable/c/448db01a48e1cdbbc31c995716a5dac1e52ba036
- https://git.kernel.org/stable/c/674b56aa57f9379854cb6798c3bbcef7e7b51ab7
- https://git.kernel.org/stable/c/716dceb19a9f8ff6c9d3aee5a771a93d6a47a0b6
- https://git.kernel.org/stable/c/94797b84cb9985022eb9cb3275c9497fbc883bb6
- https://git.kernel.org/stable/c/c1db864270eb7fea94a9ef201da0c9dc1cbab7b8