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

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Summary

CVECVE-2026-43206
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:39 UTC
Updated2026-05-11 20:05:16 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000130000 probability, percentile 0.024500000 (date 2026-05-12)

Problem Types: CWE-787

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 3e04bc310d80b46eaf481f1fefcbcb37a187412d git Not specified
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f git Not specified
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 b4034442cb090e4a980bdcc1540948606cbc951b git Not specified
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940 git Not specified
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 75fb57efdd7863fffbc39db23e9cad7aafda26ed git Not specified
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b git Not specified
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 4e72f419e4ed44cb3b60506752d8688c20a60a9b git Not specified
CNA Linux Linux affected 0fc8011f89feb8b2c3008583b777d097e1974660 8a70a26c9f34baea6c3199a9862ddaff4554a96d git Not specified
CNA Linux Linux affected 4.17 Not specified
CNA Linux Linux unaffected 4.17 semver Not specified
CNA Linux Linux unaffected 5.10.252 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4857c37c7ba9aa38b9a4c694e8bd8d0091c87940 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8a70a26c9f34baea6c3199a9862ddaff4554a96d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3e04bc310d80b46eaf481f1fefcbcb37a187412d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/75fb57efdd7863fffbc39db23e9cad7aafda26ed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4e72f419e4ed44cb3b60506752d8688c20a60a9b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b4034442cb090e4a980bdcc1540948606cbc951b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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