liveupdate: Reference count incoming FLB data

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Summary

CVECVE-2026-80642
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:49 UTC
Updated2026-08-28 08:16:49 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: liveupdate: Reference count incoming FLB data Increment the incoming FLB refcount in liveupdate_flb_get_incoming() so that the FLB structure cannot be freed while the caller is actively using it. Add an additional liveupdate_flb_put_incoming() function so the caller can explicitly indicate when it is done using the FLB data. During a Live Update, a subsystem might need to hold onto the incoming File-Lifecycle-Bound (FLB) data for an extended period, such as during device enumeration. Incrementing the reference count guarantees that the data remains valid and accessible until the subsystem releases it, preventing future use-after-free bugs.

Risk And Classification

EPSS: 0.001550000 probability, percentile 0.049970000 (date 2026-08-30)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cab056f2aae7250af50e503b81a80dfc567a1acd 725ada0273a0f48a67fd59cc518d7f8055fe3d5c git Not specified
CNA Linux Linux affected cab056f2aae7250af50e503b81a80dfc567a1acd d8e47bd066d7e626f9f45d416182d585b7e18b9b git Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d8e47bd066d7e626f9f45d416182d585b7e18b9b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/725ada0273a0f48a67fd59cc518d7f8055fe3d5c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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