mm/damon/sysfs: dealloc repeat_call_control if damon_call() fails

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Summary

CVECVE-2026-31653
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 15:16:44 UTC
Updated2026-04-27 20:16:21 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs: dealloc repeat_call_control if damon_call() fails damon_call() for repeat_call_control of DAMON_SYSFS could fail if somehow the kdamond is stopped before the damon_call(). It could happen, for example, when te damon context was made for monitroing of a virtual address processes, and the process is terminated immediately, before the damon_call() invocation. In the case, the dyanmically allocated repeat_call_control is not deallocated and leaked. Fix the leak by deallocating the repeat_call_control under the damon_call() failure. This issue is discovered by sashiko [1].

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000170000 probability, percentile 0.040590000 (date 2026-04-27)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d b9dadf026a9fb681ed32a0646adc10ab485bf3b1 git Not specified
CNA Linux Linux affected 04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d 0655f5cf1735508394ef8af98ddcfab3ac1c1cc5 git Not specified
CNA Linux Linux affected 04a06b139ec08aa63d7377f6d3e5218f8ddb1c5d 0199390a6b92fc21860e1b858abf525c7e73b956 git Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.18.23 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.13 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b9dadf026a9fb681ed32a0646adc10ab485bf3b1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0655f5cf1735508394ef8af98ddcfab3ac1c1cc5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0199390a6b92fc21860e1b858abf525c7e73b956 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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