Missing Authorization in Linux kernel - CVE-2026-80703
Published: August 28, 2026
Vulnerability identifier: #VU146102
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80703
CWE-ID: CWE-862
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to interfere with another process's active GPU debug session.
The vulnerability exists due to improper access control in KFD_IOC_DBG_TRAP_DISABLE in the amdkfd kfd chardev ioctl handler when processing a debug trap disable request for another process. A local user can invoke the ioctl through /dev/kfd to interfere with another process's active GPU debug session.
The issue affects cross-process debug operations and occurs when the caller lacks ownership or an active ptrace authorization for the target process.
Affected software
Linux kernel
How to mitigate CVE-2026-80703
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/4070909ac042f44654aac72f7986ea550c96f591
- https://git.kernel.org/stable/c/99b2fe4f19e3be0a8d0a0b5ea98d855970889653
- https://git.kernel.org/stable/c/9e52212aff8ed1fd9087728f61243ce3efd9d0ac
- https://git.kernel.org/stable/c/b8c05061997408bf81759f2dd31cd5f66771d15f
- https://git.kernel.org/stable/c/ce813614f63b020a826071276a92f2cfae7cba79