{"id":"CVE-2026-74646","summary":"misc: fastrpc: take fl-\u003elock when moving mmaps on interrupted invoke","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: take fl-\u003elock when moving mmaps on interrupted invoke\n\nWhen an invoke is interrupted by a signal,\nwait_for_completion_interruptible() returns -ERESTARTSYS and\nfastrpc_internal_invoke() moves every buffer from fl-\u003emmaps onto\ncctx-\u003einvoke_interrupted_mmaps. This list_del()/list_add_tail() walk\nruns without holding fl-\u003elock, the lock that serialises fl-\u003emmaps in\nfastrpc_req_mmap() and fastrpc_req_munmap() everywhere else.\n\nTake fl-\u003elock around the move, matching every other fl-\u003emmaps accessor.","modified":"2026-08-27T11:30:40.140096044Z","published":"2026-08-22T15:32:23.378Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74646.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3f265e405e5ef85030c3777262e18bb556bc8724"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a902fe1f80f58a2335b6be1131866f827ec44d1a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af6345159abcbaa550518f31990d2a9558c2d369"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b85a0e91d7d6cd06a53c881a46f749cfcef416a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/efd02f8d1a7449f15809bc18d3cd41aafea75d7e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74646.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74646"},{"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":"76e8e4ace1ed2c97dba3b1370e0e105e07c572bc"},{"fixed":"3f265e405e5ef85030c3777262e18bb556bc8724"},{"fixed":"a902fe1f80f58a2335b6be1131866f827ec44d1a"},{"fixed":"af6345159abcbaa550518f31990d2a9558c2d369"},{"fixed":"efd02f8d1a7449f15809bc18d3cd41aafea75d7e"},{"fixed":"b85a0e91d7d6cd06a53c881a46f749cfcef416a2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74646.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74646.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}