CVE-2026-23421
published 2026-04-03CVE-2026-23421: 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…
PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.11%
1.7th percentile
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)
Affected
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.19.8-1 (forky) | linux 6.19.8-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < 7f971dfd48983074adc7bbcea3ee95ce7aad47cb | 7f971dfd48983074adc7bbcea3ee95ce7aad47cb |
| linux | linux | >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < 3557359ea3df32430ea7c30f7a708ca9a91d7e0e | 3557359ea3df32430ea7c30f7a708ca9a91d7e0e |
| linux | linux | >= b30d5de3d40c3fa642079bac0d91f17091c5f877 < e377182f0266f46f02d01838e6bde67b9dac0d66 | e377182f0266f46f02d01838e6bde67b9dac0d66 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.19.8-1 | 6.19.8-1 |
| linux | linux_kernel | >= 6.18.1 < 6.18.17 | 6.18.17 |
| linux | linux_kernel | >= 6.19 < 6.19.7 | 6.19.7 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vendor_redhat5.5LOW
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VulDB
Linux Kernel up to 6.18.16/6.19.6/7.0-rc2 configfs wa_bb_store allocation of resources (WID-SEC-2026-0985)
vuldb·2026-06-24·CVSS 5.5
CVE-2026-23421 [MEDIUM] Linux Kernel up to 6.18.16/6.19.6/7.0-rc2 configfs wa_bb_store allocation of resources (WID-SEC-2026-0985)
A vulnerability has been found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc2 and classified as critical. This affects the function wa_bb_store of the component configfs. This manipulation causes allocation of resources.
The identification of this vulnerability is CVE-2026-23421. The attack needs to be done within the local network. There is no exploit available.
The affected component should be upgraded.
GHSA
GHSA-5rf8-f7c5-4xmw: 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
ghsa_unreviewed·2026-04-03
CVE-2026-23421 GHSA-5rf8-f7c5-4xmw: 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
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)
OSV
CVE-2026-23421: 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 a
osv·2026-04-03
CVE-2026-23421 CVE-2026-23421: 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 a
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)
Red Hat
kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
vendor_redhat·2026-04-03·CVSS 5.5
CVE-2026-23421 [LOW] CWE-772 kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
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)
A flaw was found in the Linux kernel. This vulnerability is a memory leak within the `drm/xe/configfs` subsystem, where allocated memory for `ctx_restore_mid_bb` is not properly released when a `configfs` device is removed. A local attacker could exploit this by repeatedly creating and removing `configfs` devices, leadin
Debian
CVE-2026-23421: linux - In the Linux kernel, the following vulnerability has been resolved: drm/xe/conf...
vendor_debian·2026
CVE-2026-23421 [LOW] CVE-2026-23421: linux - In the Linux kernel, the following vulnerability has been resolved: drm/xe/conf...
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)
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved (fixed in 6.19.8-1)
sid: resolved (fixed in 6.19.8-1)
trixie: resolved
No detection rules found.
No public exploits indexed.
Wiz
CVE-2026-23421 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz
CVE-2026-23421 CVE-2026-23421 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-23421 :
Linux Kernel vulnerability analysis and mitigation
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)
Source : NVD
Published April 3, 2026
CNA Score N/A
Affected Technologies
Linux Kernel
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 4
Exploitation Probability (EPSS) N/A
Affected packages an
Bugzilla
CVE-2026-23421 kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
bugzilla·2026-04-03·CVSS 5.5
CVE-2026-23421 [MEDIUM] CVE-2026-23421 kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
CVE-2026-23421 kernel: drm/xe/configfs: Free ctx_restore_mid_bb in release
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)
Discussion:
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026040304-CVE-2026-23421-dace@gregkh/T
2026-04-03
Published