Linux Kernel up to 6.18.16/6.19.6/7.0-rc2 reg_sr xa_store allocation of resources

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.18.16/6.19.6/7.0-rc2. This affects the function xa_store of the component reg_sr. This manipulation causes allocation of resources. This vulnerability appears as CVE-2026-23418. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc2. It has been declared as critical. Affected by this vulnerability is the function xa_store of the component reg_sr. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/xe/reg_sr: Fix leak on xa_store failure Free the newly allocated entry when xa_store() fails to avoid a memory leak on the error path. v2: use goto fail_free. (Bala) (cherry picked from commit 6bc6fec71ac45f52db609af4e62bdb96b9f5fadb)

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-23418 since 01/13/2026. Technical details are known, but no exploit is available.

Upgrading to version 6.18.17, 6.19.7 or 7.0-rc3 eliminates this vulnerability. Applying the patch 05e3f01974d09d1b746dedf4144f708b5033e76f/4f461da14c7b226d1c4c179ae69956ccb8e134e2/3091723785def05ebfe6a50866f87a044ae314ba is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.18.16
• 6.19.0
• 6.19.1
• 6.19.2
• 6.19.3
• 6.19.4
• 6.19.5
• 6.19.6
• 7.0-rc1
• 7.0-rc2

License

• open-source

Website

• Vendor: https://www.kernel.org/

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Entryinfo

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