CVE-2026-80642

linux: In the Linux kernel, the following vulnerability has been resolved: liveupdate: Reference count incoming FLB data I...

CVE-2026-80642 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80642 (version 7.1.5-1), released August 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
n/a
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0020
9th percentile

In 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.

Where it's fixed

ProductFixed inFixReleased
Linux
linux · Debian 14 7.1.5-1 DEBIAN-CVE-2026-80642 Aug 29, 2026

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