Out-of-bounds write in Linux kernel - CVE-2026-43206
Published: May 7, 2026
Vulnerability identifier: #VU130535
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43206
CWE-ID: CWE-787
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 escalate privileges.
The vulnerability exists due to an out-of-bounds write in kfd_event_page_set() when processing a user-supplied buffer size parameter. A local user can pass a small buffer to trigger an out-of-bounds kernel memory write to escalate privileges.
How to mitigate CVE-2026-43206
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/3e04bc310d80b46eaf481f1fefcbcb37a187412d
- https://git.kernel.org/stable/c/4857c37c7ba9aa38b9a4c694e8bd8d0091c87940
- https://git.kernel.org/stable/c/4e72f419e4ed44cb3b60506752d8688c20a60a9b
- https://git.kernel.org/stable/c/75fb57efdd7863fffbc39db23e9cad7aafda26ed
- https://git.kernel.org/stable/c/8a70a26c9f34baea6c3199a9862ddaff4554a96d
- https://git.kernel.org/stable/c/b4034442cb090e4a980bdcc1540948606cbc951b
- https://git.kernel.org/stable/c/bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b
- https://git.kernel.org/stable/c/de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f