{"id":"CVE-2024-46682","summary":"nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open\n\nPrior to commit 3f29cc82a84c (\"nfsd: split sc_status out of\nsc_type\") states_show() relied on sc_type field to be of valid\ntype before calling into a subfunction to show content of a\nparticular stateid. From that commit, we split the validity of\nthe stateid into sc_status and no longer changed sc_type to 0\nwhile unhashing the stateid. This resulted in kernel oopsing\nfor nfsv4.0 opens that stay around and in nfs4_show_open()\nwould derefence sc_file which was NULL.\n\nInstead, for closed open stateids forgo displaying information\nthat relies of having a valid sc_file.\n\nTo reproduce: mount the server with 4.0, read and close\na file and then on the server cat /proc/fs/nfsd/clients/2/states\n\n[  513.590804] Call trace:\n[  513.590925]  _raw_spin_lock+0xcc/0x160\n[  513.591119]  nfs4_show_open+0x78/0x2c0 [nfsd]\n[  513.591412]  states_show+0x44c/0x488 [nfsd]\n[  513.591681]  seq_read_iter+0x5d8/0x760\n[  513.591896]  seq_read+0x188/0x208\n[  513.592075]  vfs_read+0x148/0x470\n[  513.592241]  ksys_read+0xcc/0x178","modified":"2026-05-28T03:54:20.972090854Z","published":"2024-09-13T05:29:15.294Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46682.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/a204501e1743d695ca2930ed25a2be9f8ced96d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ba0b697de298285301c71c258598226e06494236"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46682.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-46682"},{"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":"3f29cc82a84c23cfd12b903029dd26002ca825f5"},{"fixed":"ba0b697de298285301c71c258598226e06494236"},{"fixed":"a204501e1743d695ca2930ed25a2be9f8ced96d3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46682.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.10.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46682.json"}}],"schema_version":"1.7.5"}