{"api_version":"1","generated_at":"2026-08-02T13:38:15+00:00","cve":"CVE-2026-64258","urls":{"html":"https://cve.report/CVE-2026-64258","api":"https://cve.report/api/cve/CVE-2026-64258.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64258","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64258"},"summary":{"title":"fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref\n\nIf a copy into the userspace ring buffer fails, a request will be\nterminated and fuse_uring_req_end() will set ent->fuse_req to NULL but\nit will leave the entry on ent_w_req_queue in FRRS_FUSE_REQ state. This\ncan lead to a NULL deref if the request expiration logic scans\nent_w_req_queue in the window before the entry is moved off it.\n\nFix this by taking the entry off ent_w_req_queue and changing its state\nfrom FRRS_FUSE_REQ to FRRS_INVALID before terminating the request.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:05","updated_at":"2026-07-30 15:00:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0a7f33010c0e4cd92937e088a54350381fd0fbf2","name":"https://git.kernel.org/stable/c/0a7f33010c0e4cd92937e088a54350381fd0fbf2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1c57a69be962d459c5e705f5cb4355b841b3461c","name":"https://git.kernel.org/stable/c/1c57a69be962d459c5e705f5cb4355b841b3461c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0b466cf1b96e191b06b496c4de79da15315c3a9a","name":"https://git.kernel.org/stable/c/0b466cf1b96e191b06b496c4de79da15315c3a9a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64258","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64258","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4fea593e625cd50d4d11be227007849b12f17bfb 0b466cf1b96e191b06b496c4de79da15315c3a9a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4fea593e625cd50d4d11be227007849b12f17bfb 0a7f33010c0e4cd92937e088a54350381fd0fbf2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4fea593e625cd50d4d11be227007849b12f17bfb 1c57a69be962d459c5e705f5cb4355b841b3461c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64258","cve":"CVE-2026-64258","epss":"0.001980000","percentile":"0.098430000","score_date":"2026-08-01","updated_at":"2026-08-02 00:11:13"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/fuse/dev_uring.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0b466cf1b96e191b06b496c4de79da15315c3a9a","status":"affected","version":"4fea593e625cd50d4d11be227007849b12f17bfb","versionType":"git"},{"lessThan":"0a7f33010c0e4cd92937e088a54350381fd0fbf2","status":"affected","version":"4fea593e625cd50d4d11be227007849b12f17bfb","versionType":"git"},{"lessThan":"1c57a69be962d459c5e705f5cb4355b841b3461c","status":"affected","version":"4fea593e625cd50d4d11be227007849b12f17bfb","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/fuse/dev_uring.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref\n\nIf a copy into the userspace ring buffer fails, a request will be\nterminated and fuse_uring_req_end() will set ent->fuse_req to NULL but\nit will leave the entry on ent_w_req_queue in FRRS_FUSE_REQ state. This\ncan lead to a NULL deref if the request expiration logic scans\nent_w_req_queue in the window before the entry is moved off it.\n\nFix this by taking the entry off ent_w_req_queue and changing its state\nfrom FRRS_FUSE_REQ to FRRS_INVALID before terminating the request."}],"providerMetadata":{"dateUpdated":"2026-07-25T08:49:10.093Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0b466cf1b96e191b06b496c4de79da15315c3a9a"},{"url":"https://git.kernel.org/stable/c/0a7f33010c0e4cd92937e088a54350381fd0fbf2"},{"url":"https://git.kernel.org/stable/c/1c57a69be962d459c5e705f5cb4355b841b3461c"}],"title":"fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64258","datePublished":"2026-07-25T08:49:10.093Z","dateReserved":"2026-07-19T15:36:31.773Z","dateUpdated":"2026-07-25T08:49:10.093Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:05","lastModifiedDate":"2026-07-30 15:00:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64258","Ordinal":"1","Title":"fuse-uring: remove request-less entries from ent_w_req_queue to ","CVE":"CVE-2026-64258","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64258","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref\n\nIf a copy into the userspace ring buffer fails, a request will be\nterminated and fuse_uring_req_end() will set ent->fuse_req to NULL but\nit will leave the entry on ent_w_req_queue in FRRS_FUSE_REQ state. This\ncan lead to a NULL deref if the request expiration logic scans\nent_w_req_queue in the window before the entry is moved off it.\n\nFix this by taking the entry off ent_w_req_queue and changing its state\nfrom FRRS_FUSE_REQ to FRRS_INVALID before terminating the request.","Type":"Description","Title":"fuse-uring: remove request-less entries from ent_w_req_queue to "}]}}}