{"id":"CVE-2026-80642","summary":"liveupdate: Reference count incoming FLB data","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nliveupdate: Reference count incoming FLB data\n\nIncrement the incoming FLB refcount in liveupdate_flb_get_incoming() so\nthat the FLB structure cannot be freed while the caller is actively using\nit. Add an additional liveupdate_flb_put_incoming() function so the\ncaller can explicitly indicate when it is done using the FLB data.\n\nDuring a Live Update, a subsystem might need to hold onto the incoming\nFile-Lifecycle-Bound (FLB) data for an extended period, such as during\ndevice enumeration. Incrementing the reference count guarantees that the\ndata remains valid and accessible until the subsystem releases it,\npreventing future use-after-free bugs.","modified":"2026-08-30T03:48:22.906369415Z","published":"2026-08-28T06:48:53.841Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80642.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/725ada0273a0f48a67fd59cc518d7f8055fe3d5c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d8e47bd066d7e626f9f45d416182d585b7e18b9b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80642.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80642"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cab056f2aae7250af50e503b81a80dfc567a1acd"},{"fixed":"725ada0273a0f48a67fd59cc518d7f8055fe3d5c"},{"fixed":"d8e47bd066d7e626f9f45d416182d585b7e18b9b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80642.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80642.json"}}],"schema_version":"1.9.0"}