{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-50121", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-50121", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-11-05T17:10:50.523Z", "updatedAt": "2026-10-15T00:57:07.488Z", "importedAt": "2026-10-24T01:57:20.494Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "nfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net\n\nIn the normal case, when we excute `echo 0 > /proc/fs/nfsd/threads`, the\nfunction `nfs4_state_destroy_net` in `nfs4_state_shutdown_net` will\nrelease all resources related to the hashed `nfs4_client`. If the\n`nfsd_client_shrinker` is running concurrently, the `expire_client`\nfunction will first unhash this client and then destroy it. This can\nlead to the following warning. Additionally, numerous use-after-free\nerrors may occur as well.\n\nnfsd_client_shrinker echo 0 > /proc/fs/nfsd/threads\n\nexpire_client nfsd_shutdown_net\n unhash_client ...\n nfs4_state_shutdown_net\n /* won't wait shrinker exit */\n /* cancel_work(&nn->nfsd_shrinker_work)\n * nfsd_file for this /* won't destroy unhashed client1 */\n * client1 still alive nfs4_state_destroy_net\n */\n\n nfsd_file_cache_shutdown\n /* trigger warning */\n kmem_cache_destroy(nfsd_file_slab)\n kmem_cache_destroy(nfsd_file_mark_slab)\n /* release nfsd_file and mark */\n __destroy_client\n\n====================================================================\nBUG nfsd_file (Not tainted): Objects remaining in nfsd_file on\n__kmem_cache_shutdown()\n--------------------------------------------------------------------\nCPU: 4 UID: 0 PID: 764 Comm: sh Not tainted 6.12.0-rc3+ #1\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xac/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n====================================================================\nBUG nfsd_file_mark (Tainted: G B W ): Objects remaining\nnfsd_file_mark on __kmem_cache_shutdown()\n--------------------------------------------------------------------\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xc8/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nTo resolve this issue, cancel `nfsd_shrinker_work` using synchronous\nmode in nfs4_state_shutdown_net.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "2bbf10861d51dae76c6da7113516d0071c782653", "status": "affected", "versionType": "git", "lessThan": "f67138dd338cb564ade7d3755c8cd4f68b46d397" }, { "version": "958294a3eb82026fcfff20b0287a90e9c854785e", "status": "affected", "versionType": "git", "lessThan": "5ade4382de16c34d9259cb548f36ec5c4555913c" }, { "version": "f3ea5ec83d1a827f074b2b660749817e0bf2b23e", "status": "affected", "versionType": "git", "lessThan": "36775f42e039b01d4abe8998bf66771a37d3cdcc" }, { "version": "7c24fa225081f31bc6da6a355c1ba801889ab29a", "status": "affected", "versionType": "git", "lessThan": "f965dc0f099a54fca100acf6909abe52d0c85328" }, { "version": "7c24fa225081f31bc6da6a355c1ba801889ab29a", "status": "affected", "versionType": "git", "lessThan": "add1df5eba163a3a6ece11cb85890e2e410baaea" }, { "version": "7c24fa225081f31bc6da6a355c1ba801889ab29a", "status": "affected", "versionType": "git", "lessThan": "d5ff2fb2e7167e9483846e34148e60c0c016a1f6" }, { "version": "5.10.220", "status": "affected", "versionType": "semver", "lessThan": "5.10.233" }, { "version": "5.15.154", "status": "affected", "versionType": "semver", "lessThan": "5.15.176" }, { "version": "6.1.81", "status": "affected", "versionType": "semver", "lessThan": "6.1.123" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.2" }, { "version": "5.10.233", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.176", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.123", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.59", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.11.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.11.*" }, { "version": "6.12", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }