What’s Vulnerable › Vulnerabilities

CVE-2026-23421: drm/xe/configfs: Free ctx_restore_mid_bb in release

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-03 · updated 2026-07-24

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)

Affected products

• Linux kernel: from 6.18.1 before 6.18.17; from 6.19 before 6.19.7; 6.18, 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5 (+2) — fixed in 6.18.17, 6.19.7

How to fix

Upgrade to a fixed version: Linux kernel 6.18.17, 6.19.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3557359ea3df32430ea7c30f7a708ca9a91d7e0e
• https://git.kernel.org/stable/c/7f971dfd48983074adc7bbcea3ee95ce7aad47cb
• https://git.kernel.org/stable/c/e377182f0266f46f02d01838e6bde67b9dac0d66

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