{"api_version":"1","generated_at":"2026-09-23T06:16:05+00:00","cve":"CVE-2026-80642","urls":{"html":"https://cve.report/CVE-2026-80642","api":"https://cve.report/api/cve/CVE-2026-80642.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80642","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80642"},"summary":{"title":"liveupdate: Reference count incoming FLB data","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:49","updated_at":"2026-08-28 08:16:49"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d8e47bd066d7e626f9f45d416182d585b7e18b9b","name":"https://git.kernel.org/stable/c/d8e47bd066d7e626f9f45d416182d585b7e18b9b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/725ada0273a0f48a67fd59cc518d7f8055fe3d5c","name":"https://git.kernel.org/stable/c/725ada0273a0f48a67fd59cc518d7f8055fe3d5c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80642","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80642","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cab056f2aae7250af50e503b81a80dfc567a1acd 725ada0273a0f48a67fd59cc518d7f8055fe3d5c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cab056f2aae7250af50e503b81a80dfc567a1acd d8e47bd066d7e626f9f45d416182d585b7e18b9b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80642","cve":"CVE-2026-80642","epss":"0.001550000","percentile":"0.049970000","score_date":"2026-08-30","updated_at":"2026-08-31 00:14:06"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/liveupdate.h","kernel/liveupdate/luo_flb.c","lib/tests/liveupdate.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"725ada0273a0f48a67fd59cc518d7f8055fe3d5c","status":"affected","version":"cab056f2aae7250af50e503b81a80dfc567a1acd","versionType":"git"},{"lessThan":"d8e47bd066d7e626f9f45d416182d585b7e18b9b","status":"affected","version":"cab056f2aae7250af50e503b81a80dfc567a1acd","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/liveupdate.h","kernel/liveupdate/luo_flb.c","lib/tests/liveupdate.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"7.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-08-28T06:48:53.841Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/725ada0273a0f48a67fd59cc518d7f8055fe3d5c"},{"url":"https://git.kernel.org/stable/c/d8e47bd066d7e626f9f45d416182d585b7e18b9b"}],"title":"liveupdate: Reference count incoming FLB data","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80642","datePublished":"2026-08-28T06:48:53.841Z","dateReserved":"2026-08-26T14:34:25.778Z","dateUpdated":"2026-08-28T06:48:53.841Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:49","lastModifiedDate":"2026-08-28 08:16:49","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80642","Ordinal":"1","Title":"liveupdate: Reference count incoming FLB data","CVE":"CVE-2026-80642","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80642","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"liveupdate: Reference count incoming FLB data"}]}}}