CVE-2026-43206 PUBLISHED

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

Assigner: Linux
Reserved: 01.05.2026 Published: 06.05.2026 Updated: 06.05.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 3e04bc310d80b46eaf481f1fefcbcb37a187412d (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to b4034442cb090e4a980bdcc1540948606cbc951b (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 75fb57efdd7863fffbc39db23e9cad7aafda26ed (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 4e72f419e4ed44cb3b60506752d8688c20a60a9b (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 8a70a26c9f34baea6c3199a9862ddaff4554a96d (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • unaffected from 5.10.252 to 5.10.* (incl.)
  • unaffected from 5.15.202 to 5.15.* (incl.)
  • unaffected from 6.1.165 to 6.1.* (incl.)
  • unaffected from 6.6.128 to 6.6.* (incl.)
  • unaffected from 6.12.75 to 6.12.* (incl.)
  • unaffected from 6.18.16 to 6.18.* (incl.)
  • unaffected from 6.19.6 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References