Bug 2454775 (CVE-2026-23421) - CVE-2026-23421 kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
Summary: CVE-2026-23421 kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
Keywords:
Status: NEW
Alias: CVE-2026-23421
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-03 14:01 UTC by OSIDB Bzimport
Modified: 2026-04-03 15:07 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-04-03 14:01:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/xe/configfs: Free ctx_restore_mid_bb in release

ctx_restore_mid_bb memory is allocated in wa_bb_store(), but
xe_config_device_release() only frees ctx_restore_post_bb.

Free ctx_restore_mid_bb[0].cs as well to avoid leaking the allocation
when the configfs device is removed.

(cherry picked from commit a235e7d0098337c3f2d1e8f3610c719a589e115f)
Comment 1 Alexander B 2026-04-03 15:04:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026040304-CVE-2026-23421-dace@gregkh/T
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