{"id":"CVE-2026-64258","summary":"fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref","details":"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-\u003efuse_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.","modified":"2026-08-18T03:30:59.847179631Z","published":"2026-07-25T08:49:10.093Z","related":["openSUSE-SU-2026:11476-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64258.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a7f33010c0e4cd92937e088a54350381fd0fbf2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0b466cf1b96e191b06b496c4de79da15315c3a9a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c57a69be962d459c5e705f5cb4355b841b3461c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64258.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64258"},{"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":"4fea593e625cd50d4d11be227007849b12f17bfb"},{"fixed":"0b466cf1b96e191b06b496c4de79da15315c3a9a"},{"fixed":"0a7f33010c0e4cd92937e088a54350381fd0fbf2"},{"fixed":"1c57a69be962d459c5e705f5cb4355b841b3461c"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64258.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.16.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-64258.json"}}],"schema_version":"1.9.0"}