{"api_version":"1","generated_at":"2026-08-02T13:38:14+00:00","cve":"CVE-2026-64266","urls":{"html":"https://cve.report/CVE-2026-64266","api":"https://cve.report/api/cve/CVE-2026-64266.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64266","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64266"},"summary":{"title":"fuse: re-lock request before returning from fuse_ref_folio()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before returning from fuse_ref_folio()\n\nfuse_ref_folio() unlocks the request but does not re-lock it before\nreturning. fuse_chan_abort() can end the request and the async end\ncallback (eg fuse_writepage_free()) can free the args while the\nsubsequent copy chain logic after fuse_ref_folio() accesses them,\nleading to use-after-free issues.\n\nFix this by locking the request in fuse_ref_folio() before returning.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:06","updated_at":"2026-07-30 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64266","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c3021629a0d820247ee12b6c5192a1d5380e21c6 1f9156714592356b4fda57beac7eab9c2a462dd3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c3021629a0d820247ee12b6c5192a1d5380e21c6 5630da218a45ba80f0aba0846cbe8aa655da122b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c3021629a0d820247ee12b6c5192a1d5380e21c6 1ca605cfa59377f0143fb35b5b01360f37d1b7c4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c3021629a0d820247ee12b6c5192a1d5380e21c6 0e4a5a000123d81234e27a2f8187688cf608f755 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before returning from fuse_ref_folio()\n\nfuse_ref_folio() unlocks the request but does not re-lock it before\nreturning. fuse_chan_abort() can end the request and the async end\ncallback (eg fuse_writepage_free()) can free the args while the\nsubsequent copy chain logic after fuse_ref_folio() accesses them,\nleading to use-after-free issues.\n\nFix this by locking the request in fuse_ref_folio() before returning."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-27T04:59:17.096Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1f9156714592356b4fda57beac7eab9c2a462dd3"},{"url":"https://git.kernel.org/stable/c/5630da218a45ba80f0aba0846cbe8aa655da122b"},{"url":"https://git.kernel.org/stable/c/1ca605cfa59377f0143fb35b5b01360f37d1b7c4"},{"url":"https://git.kernel.org/stable/c/0e4a5a000123d81234e27a2f8187688cf608f755"},{"url":"https://git.kernel.org/stable/c/e6aa539720c3d8def69683ed0c07cf9faea4e8be"},{"url":"https://git.kernel.org/stable/c/be353caffa8640f5e25fb3714ce8b0cef5e410e5"},{"url":"https://git.kernel.org/stable/c/65a1c2551f7e16085acbb54aedde1feaa559ba7a"},{"url":"https://git.kernel.org/stable/c/b5befa80fdbe287a98480effed9564712924add5"}],"title":"fuse: re-lock request before returning from fuse_ref_folio()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64266","datePublished":"2026-07-25T08:49:15.142Z","dateReserved":"2026-07-19T15:36:31.775Z","dateUpdated":"2026-07-27T04:59:17.096Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:06","lastModifiedDate":"2026-07-30 15:00:27","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64266","Ordinal":"1","Title":"fuse: re-lock request before returning from fuse_ref_folio()","CVE":"CVE-2026-64266","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64266","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before returning from fuse_ref_folio()\n\nfuse_ref_folio() unlocks the request but does not re-lock it before\nreturning. fuse_chan_abort() can end the request and the async end\ncallback (eg fuse_writepage_free()) can free the args while the\nsubsequent copy chain logic after fuse_ref_folio() accesses them,\nleading to use-after-free issues.\n\nFix this by locking the request in fuse_ref_folio() before returning.","Type":"Description","Title":"fuse: re-lock request before returning from fuse_ref_folio()"}]}}}