Bug 2467156 (CVE-2026-43206) - CVE-2026-43206 kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()
Summary: CVE-2026-43206 kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_...
Keywords:
Status: NEW
Alias: CVE-2026-43206
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-06 13:07 UTC by OSIDB Bzimport
Modified: 2026-08-20 05:22 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:55764 0 None None None 2026-08-17 16:51:29 UTC
Red Hat Product Errata RHSA-2026:55765 0 None None None 2026-08-17 15:30:02 UTC
Red Hat Product Errata RHSA-2026:57251 0 None None None 2026-08-20 05:22:16 UTC
Red Hat Product Errata RHSA-2026:57252 0 None None None 2026-08-20 05:13:28 UTC

Description OSIDB Bzimport 2026-05-06 13:07:36 UTC 
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.
Comment 1 Keith Grant 2026-05-06 21:29:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050647-CVE-2026-43206-ca61@gregkh/T
Comment 6 errata-xmlrpc 2026-08-17 15:30:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:55765 https://access.redhat.com/errata/RHSA-2026:55765
Comment 7 errata-xmlrpc 2026-08-17 16:51:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:55764 https://access.redhat.com/errata/RHSA-2026:55764
Comment 8 errata-xmlrpc 2026-08-20 05:13:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:57252 https://access.redhat.com/errata/RHSA-2026:57252
Comment 9 errata-xmlrpc 2026-08-20 05:22:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:57251 https://access.redhat.com/errata/RHSA-2026:57251
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