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

Summary

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.

Timeline

1. May 6, 2026, 11:28 AM UTCCVE published
2. Oct 16, 2026, 3:15 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 7:16 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in 3e04bc310d80b46eaf481f1fefcbcb37a187412d; From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f; From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in b4034442cb090e4a980bdcc1540948606cbc951b; From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940; From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in 75fb57efdd7863fffbc39db23e9cad7aafda26ed; From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b; From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in 4e72f419e4ed44cb3b60506752d8688c20a60a9b; From 0fc8011f89feb8b2c3008583b777d097e1974660 · fixed in 8a70a26c9f34baea6c3199a9862ddaff4554a96d

• Linux Linux

  4.17

• KernelLinux

  From 4.17.0 · fixed in 5.10.252; From 5.11.0 · fixed in 5.15.202; From 5.16.0 · fixed in 6.1.165; From 6.2.0 · fixed in 6.6.128; From 6.7.0 · fixed in 6.12.75; From 6.13.0 · fixed in 6.18.16; From 6.19.0 · fixed in 6.19.6

References 8