CVE-2026-43206

drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

State: Published
Severity: 7.8 High
Published: May 6, 2026
Updated: Oct 19, 2026
Reserved: May 1, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without checking the buffer size parameter. This allows unprivileged userspace to trigger an out-of bounds kernel memory write by passing a small buffer, leading to potential privilege escalation.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
LinuxLinux	0fc8011f89feb8b2c3008583b777d097e1974660 to before 3e04bc310d80b46eaf481f1fefcbcb37a187412dAffected 0fc8011f89feb8b2c3008583b777d097e1974660 to before de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781fAffected 0fc8011f89feb8b2c3008583b777d097e1974660 to before b4034442cb090e4a980bdcc1540948606cbc951bAffected 0fc8011f89feb8b2c3008583b777d097e1974660 to before 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940Affected 0fc8011f89feb8b2c3008583b777d097e1974660 to before 75fb57efdd7863fffbc39db23e9cad7aafda26edAffected 0fc8011f89feb8b2c3008583b777d097e1974660 to before bfcd6b53e1f4feb182952f4ff9a137c36ceaf20bAffected 0fc8011f89feb8b2c3008583b777d097e1974660 to before 4e72f419e4ed44cb3b60506752d8688c20a60a9bAffected 0fc8011f89feb8b2c3008583b777d097e1974660 to before 8a70a26c9f34baea6c3199a9862ddaff4554a96dAffected
LinuxLinux	4.17Affected before 4.17Not affected 5.10.252 through 5.10.Not affected 5.15.202 through 5.15.Not affected 6.1.165 through 6.1.Not affected 6.6.128 through 6.6.Not affected 6.12.75 through 6.12.Not affected 6.18.16 through 6.18.Not affected 6.19.6 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

0fc8011f89feb8b2c3008583b777d097e1974660 to before 3e04bc310d80b46eaf481f1fefcbcb37a187412dAffected
0fc8011f89feb8b2c3008583b777d097e1974660 to before de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781fAffected
0fc8011f89feb8b2c3008583b777d097e1974660 to before b4034442cb090e4a980bdcc1540948606cbc951bAffected
0fc8011f89feb8b2c3008583b777d097e1974660 to before 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940Affected
0fc8011f89feb8b2c3008583b777d097e1974660 to before 75fb57efdd7863fffbc39db23e9cad7aafda26edAffected
0fc8011f89feb8b2c3008583b777d097e1974660 to before bfcd6b53e1f4feb182952f4ff9a137c36ceaf20bAffected
0fc8011f89feb8b2c3008583b777d097e1974660 to before 4e72f419e4ed44cb3b60506752d8688c20a60a9bAffected
0fc8011f89feb8b2c3008583b777d097e1974660 to before 8a70a26c9f34baea6c3199a9862ddaff4554a96dAffected

LinuxLinux

4.17Affected
before 4.17Not affected
5.10.252 through 5.10.*Not affected
5.15.202 through 5.15.*Not affected
6.1.165 through 6.1.*Not affected
6.6.128 through 6.6.*Not affected
6.12.75 through 6.12.*Not affected
6.18.16 through 6.18.*Not affected
6.19.6 through 6.19.*Not affected
7.0 and laterNot affected

References

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