SB20260507146 - Out-of-bounds write in Linux kernel amd amdkfd driver
Published: May 7, 2026
Security Bulletin ID
SB20260507146
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-43206)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 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
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.
Remediation
Install update from vendor's website.
References
- 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