genetlink: pin family module during policy dump

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Summary

CVECVE-2026-97901
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:16 UTC
Updated2026-09-25 11:17:16 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: genetlink: pin family module during policy dump The generic netlink controller's policy dump keeps pointers to the target family's operation and policy tables in its callback state. A dump may be split across multiple skbs and remain pending after the initial request. Netlink pins the module which owns the dump callback, but in this case that is the controller's owner rather than the target family's owner. The target family can consequently be unregistered and its module unloaded while a policy dump is pending. Advancing the dump then dereferences policy memory from the unloaded module. Take a reference to the target family's module when the dump starts. Drop it from the error and done paths. This matches the lifetime for which the dump context retains the family and policy pointers.

Risk And Classification

EPSS: 0.001980000 probability, percentile 0.085880000 (date 2026-09-27)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d07dcf9aadd6b2842b439e8668ff7ea2873f28d7 508387ad95ef9c13aa6431678c39763e882da2dc git Not specified
CNA Linux Linux affected d07dcf9aadd6b2842b439e8668ff7ea2873f28d7 6d8e653fcf1c90310797eeba8e5fafe9ccc3de9e git Not specified
CNA Linux Linux affected d07dcf9aadd6b2842b439e8668ff7ea2873f28d7 6a1094c34d176827b2b173e163dcc964a13af93f git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6a1094c34d176827b2b173e163dcc964a13af93f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6d8e653fcf1c90310797eeba8e5fafe9ccc3de9e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/508387ad95ef9c13aa6431678c39763e882da2dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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