Use-after-free in Linux kernel - CVE-2026-45972
Published: May 28, 2026
Vulnerability identifier: #VU132513
CSH Severity: Low
CVSS v4.0: 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-2026-45972
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in smb2_open_file() when retrying SMB2_open(). A local user can trigger the retry path to cause a denial of service.
The issue can also result in a double free when @data is NULL.
How to mitigate CVE-2026-45972
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0
- https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81
- https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151
- https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74
- https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73
- https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda