Linux Kernel up to 6.18.35/7.0.12 mm damon_lru_sort_enabled_store null pointer dereference

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.35/7.0.12. It has been rated as critical. This affects the function damon_lru_sort_enabled_store of the component mm. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2026-53335. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.35/7.0.12. It has been rated as critical. This issue affects the function damon_lru_sort_enabled_store of the component mm. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: mm/damon/lru_sort: handle ctx allocation failure DAMON_LRU_SORT allocates the damon_ctx object for its kdamond in its init function. damon_lru_sort_enabled_store() wrongly assumes the allocation will always succeed once tried. If the damon_ctx allocation was failed, therefore, code execution reaches to damon_commit_ctx() while 'ctx' is NULL. As a result, it dereferences the NULL 'ctx' pointer. Avoid the NULL dereference by returning -ENOMEM if 'ctx' is NULL.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2026-53335 since 06/09/2026. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.18.36 or 7.0.13 eliminates this vulnerability. Applying the patch 6d48f15659395bf1381114f01be91bc68e0be46a/daab1996431a71f43219dcac48ecc9ad2aad3f1c/ab04340b5ae5d52c1d46b750538febcde9d889e7 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
• 6.18.17
• 6.18.18
• 6.18.19
• 6.18.20
• 6.18.21
• 6.18.22
• 6.18.23
• 6.18.24
• 6.18.25
• 6.18.26
• 6.18.27
• 6.18.28
• 6.18.29
• 6.18.30
• 6.18.31
• 6.18.32
• 6.18.33
• 6.18.34
• 6.18.35
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10
• 7.0.11
• 7.0.12

License

• open-source

Website

• Vendor: https://www.kernel.org/

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