Improper input validation in Linux kernel - CVE-2026-80865
Published: September 5, 2026
Vulnerability identifier: #VU147048
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80865
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause an invalid user-space pointer to be accessed.
The vulnerability exists due to improper input validation in the copy_user_syms function when processing a user-space pointer array. A local user can provide a user-space pointer array without prior range validation to cause an invalid user-space pointer to be accessed.
Affected software
Linux kernel
How to mitigate CVE-2026-80865
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0b6252afcd1965f77c6a6f8a802a2e1381822b98
- https://git.kernel.org/stable/c/128391b57e0977c35243672a6f970073651f3831
- https://git.kernel.org/stable/c/28ce7bcf8a29aa395b60764df4c97be745de89d0
- https://git.kernel.org/stable/c/8b719cef5ac30ab83ce5693c5faf10e4944874af
- https://git.kernel.org/stable/c/a67f7f9647cb243b3be32163e88e5bc76e3d51e9
- https://git.kernel.org/stable/c/d5dc200c3a3f217de072af269dd90adddf90e48d