CVE-2026-23421
Received Received - Intake
Memory Leak in Linux Kernel drm/xe Configfs Component Fixed

Publication date: 2026-04-03

Last updated on: 2026-04-24

Assigner: kernel.org

Description
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)
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Meta Information
Published
2026-04-03
Last Modified
2026-04-24
Generated
2026-06-16
AI Q&A
2026-04-04
EPSS Evaluated
2026-06-14
NVD
CVE-2026-23421
EUVD
EUVD-2026-18639
Affected Vendors & Products
Showing 10 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.18
linux linux_kernel From 6.18.1 (inc) to 6.18.17 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.7 (exc)
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version that includes the fix for the drm/xe/configfs memory leak issue. This fix ensures that the ctx_restore_mid_bb memory is properly freed when the configfs device is removed, preventing memory leaks.

If updating immediately is not possible, avoid removing the configfs device related to drm/xe until a patch is applied, as the vulnerability occurs during device release.

Executive Summary

This vulnerability is related to the Linux kernel's drm/xe/configfs component. Specifically, it involves improper memory management where a certain allocated memory (ctx_restore_mid_bb) is not freed properly when the configfs device is removed. The function wa_bb_store() allocates this memory, but the release function xe_config_device_release() only frees a different memory allocation (ctx_restore_post_bb), leading to a memory leak.

Impact Analysis

The impact of this vulnerability is a memory leak in the Linux kernel's drm/xe/configfs subsystem. Over time, this could lead to increased memory usage and potentially degrade system performance or stability, especially on systems that frequently add and remove configfs devices.

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