Improper access control in Linux kernel - CVE-2026-45993
Published: May 28, 2026
Vulnerability identifier: #VU132502
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45993
CWE-ID: CWE-284
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 disclose sensitive information.
The vulnerability exists due to improper access control in the LoongArch syscall dispatch table when processing user-controlled syscall numbers. A local user can supply a crafted syscall number to disclose sensitive information.
The syscall number is directly controlled from userspace.
How to mitigate CVE-2026-45993
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/07040904ad217545be096d4280ed33c02f6a3750
- https://git.kernel.org/stable/c/0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d
- https://git.kernel.org/stable/c/108f2cd13577a410c0ad6ea00708596d9d0dfc90
- https://git.kernel.org/stable/c/85cbf7fb568af5358aae61925c4e66b8f5e1439d
- https://git.kernel.org/stable/c/bc84a109c2082dd0c4b38e8d923c046b41977533