{"id":"CVE-2023-54258","summary":"cifs: fix potential oops in cifs_oplock_break","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix potential oops in cifs_oplock_break\n\nWith deferred close we can have closes that race with lease breaks,\nand so with the current checks for whether to send the lease response,\noplock_response(), this can mean that an unmount (kill_sb) can occur\njust before we were checking if the tcon-\u003eses is valid.  See below:\n\n[Fri Aug  4 04:12:50 2023] RIP: 0010:cifs_oplock_break+0x1f7/0x5b0 [cifs]\n[Fri Aug  4 04:12:50 2023] Code: 7d a8 48 8b 7d c0 c0 e9 02 48 89 45 b8 41 89 cf e8 3e f5 ff ff 4c 89 f7 41 83 e7 01 e8 82 b3 03 f2 49 8b 45 50 48 85 c0 74 5e \u003c48\u003e 83 78 60 00 74 57 45 84 ff 75 52 48 8b 43 98 48 83 eb 68 48 39\n[Fri Aug  4 04:12:50 2023] RSP: 0018:ffffb30607ddbdf8 EFLAGS: 00010206\n[Fri Aug  4 04:12:50 2023] RAX: 632d223d32612022 RBX: ffff97136944b1e0 RCX: 0000000080100009\n[Fri Aug  4 04:12:50 2023] RDX: 0000000000000001 RSI: 0000000080100009 RDI: ffff97136944b188\n[Fri Aug  4 04:12:50 2023] RBP: ffffb30607ddbe58 R08: 0000000000000001 R09: ffffffffc08e0900\n[Fri Aug  4 04:12:50 2023] R10: 0000000000000001 R11: 000000000000000f R12: ffff97136944b138\n[Fri Aug  4 04:12:50 2023] R13: ffff97149147c000 R14: ffff97136944b188 R15: 0000000000000000\n[Fri Aug  4 04:12:50 2023] FS:  0000000000000000(0000) GS:ffff9714f7c00000(0000) knlGS:0000000000000000\n[Fri Aug  4 04:12:50 2023] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[Fri Aug  4 04:12:50 2023] CR2: 00007fd8de9c7590 CR3: 000000011228e000 CR4: 0000000000350ef0\n[Fri Aug  4 04:12:50 2023] Call Trace:\n[Fri Aug  4 04:12:50 2023]  \u003cTASK\u003e\n[Fri Aug  4 04:12:50 2023]  process_one_work+0x225/0x3d0\n[Fri Aug  4 04:12:50 2023]  worker_thread+0x4d/0x3e0\n[Fri Aug  4 04:12:50 2023]  ? process_one_work+0x3d0/0x3d0\n[Fri Aug  4 04:12:50 2023]  kthread+0x12a/0x150\n[Fri Aug  4 04:12:50 2023]  ? set_kthread_struct+0x50/0x50\n[Fri Aug  4 04:12:50 2023]  ret_from_fork+0x22/0x30\n[Fri Aug  4 04:12:50 2023]  \u003c/TASK\u003e\n\nTo fix this change the ordering of the checks before sending the oplock_response\nto first check if the openFileList is empty.","modified":"2026-04-02T09:45:43.328989Z","published":"2025-12-30T12:15:52.855Z","related":["SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54258.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5ee28bcfbaacf289eb25c662a2862542ea6ce6a7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6b67a6d2e50634fe127e656147c81915955e9f5e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b99f490ea87ebcca3a429fd8837067feb56a4c7c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e8f5f849ffce24490eb9449e98312b66c0dba76f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54258.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54258"},{"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":"63fb45ddc491895c4b36664e0c2c3b548545ae93"},{"fixed":"b99f490ea87ebcca3a429fd8837067feb56a4c7c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1bf709b9625001eefdd41048c5f4c7544ee33394"},{"fixed":"5ee28bcfbaacf289eb25c662a2862542ea6ce6a7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3b4c15171c3ce9120c81f5564b9367d8d0f4219c"},{"fixed":"6b67a6d2e50634fe127e656147c81915955e9f5e"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"da787d5b74983f7525d1eb4b9c0b4aff2821511a"},{"fixed":"e8f5f849ffce24490eb9449e98312b66c0dba76f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"cff7fb969edaeff2bc80c8a8f7cf7b0c8df32da7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54258.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.121"},{"fixed":"5.15.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.1.39"},{"fixed":"6.1.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.4.4"},{"fixed":"6.4.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54258.json"}}],"schema_version":"1.7.5"}