{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-53216","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-11-19T17:17:25.024Z","datePublished":"2024-12-27T13:50:01.869Z","dateUpdated":"2025-05-04T09:56:09.255Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T09:56:09.255Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: release svc_expkey/svc_export with rcu_work\n\nThe last reference for `cache_head` can be reduced to zero in `c_show`\nand `e_show`(using `rcu_read_lock` and `rcu_read_unlock`). Consequently,\n`svc_export_put` and `expkey_put` will be invoked, leading to two\nissues:\n\n1. The `svc_export_put` will directly free ex_uuid. However,\n   `e_show`/`c_show` will access `ex_uuid` after `cache_put`, which can\n   trigger a use-after-free issue, shown below.\n\n   ==================================================================\n   BUG: KASAN: slab-use-after-free in svc_export_show+0x362/0x430 [nfsd]\n   Read of size 1 at addr ff11000010fdc120 by task cat/870\n\n   CPU: 1 UID: 0 PID: 870 Comm: cat Not tainted 6.12.0-rc3+ #1\n   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\n   1.16.1-2.fc37 04/01/2014\n   Call Trace:\n    <TASK>\n    dump_stack_lvl+0x53/0x70\n    print_address_description.constprop.0+0x2c/0x3a0\n    print_report+0xb9/0x280\n    kasan_report+0xae/0xe0\n    svc_export_show+0x362/0x430 [nfsd]\n    c_show+0x161/0x390 [sunrpc]\n    seq_read_iter+0x589/0x770\n    seq_read+0x1e5/0x270\n    proc_reg_read+0xe1/0x140\n    vfs_read+0x125/0x530\n    ksys_read+0xc1/0x160\n    do_syscall_64+0x5f/0x170\n    entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n   Allocated by task 830:\n    kasan_save_stack+0x20/0x40\n    kasan_save_track+0x14/0x30\n    __kasan_kmalloc+0x8f/0xa0\n    __kmalloc_node_track_caller_noprof+0x1bc/0x400\n    kmemdup_noprof+0x22/0x50\n    svc_export_parse+0x8a9/0xb80 [nfsd]\n    cache_do_downcall+0x71/0xa0 [sunrpc]\n    cache_write_procfs+0x8e/0xd0 [sunrpc]\n    proc_reg_write+0xe1/0x140\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   Freed by task 868:\n    kasan_save_stack+0x20/0x40\n    kasan_save_track+0x14/0x30\n    kasan_save_free_info+0x3b/0x60\n    __kasan_slab_free+0x37/0x50\n    kfree+0xf3/0x3e0\n    svc_export_put+0x87/0xb0 [nfsd]\n    cache_purge+0x17f/0x1f0 [sunrpc]\n    nfsd_destroy_serv+0x226/0x2d0 [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\n2. We cannot sleep while using `rcu_read_lock`/`rcu_read_unlock`.\n   However, `svc_export_put`/`expkey_put` will call path_put, which\n   subsequently triggers a sleeping operation due to the following\n   `dput`.\n\n   =============================\n   WARNING: suspicious RCU usage\n   5.10.0-dirty #141 Not tainted\n   -----------------------------\n   ...\n   Call Trace:\n   dump_stack+0x9a/0xd0\n   ___might_sleep+0x231/0x240\n   dput+0x39/0x600\n   path_put+0x1b/0x30\n   svc_export_put+0x17/0x80\n   e_show+0x1c9/0x200\n   seq_read_iter+0x63f/0x7c0\n   seq_read+0x226/0x2d0\n   vfs_read+0x113/0x2c0\n   ksys_read+0xc9/0x170\n   do_syscall_64+0x33/0x40\n   entry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nFix these issues by using `rcu_work` to help release\n`svc_expkey`/`svc_export`. This approach allows for an asynchronous\ncontext to invoke `path_put` and also facilitates the freeing of\n`uuid/exp/key` after an RCU grace period."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/export.c","fs/nfsd/export.h"],"versions":[{"version":"9ceddd9da13434a5906255c0fc528c385aded283","lessThan":"bd8524148dd8c123334b066faa90590ba2ef8e6f","status":"affected","versionType":"git"},{"version":"9ceddd9da13434a5906255c0fc528c385aded283","lessThan":"2e4854599200f4d021df8ae17e69221d7c149f3e","status":"affected","versionType":"git"},{"version":"9ceddd9da13434a5906255c0fc528c385aded283","lessThan":"ad4363a24a5746b257c0beb5d8cc68f9b62c173f","status":"affected","versionType":"git"},{"version":"9ceddd9da13434a5906255c0fc528c385aded283","lessThan":"f8c989a0c89a75d30f899a7cabdc14d72522bb8d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/export.c","fs/nfsd/export.h"],"versions":[{"version":"4.20","status":"affected"},{"version":"0","lessThan":"4.20","status":"unaffected","versionType":"semver"},{"version":"6.6.64","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.11.11","lessThanOrEqual":"6.11.*","status":"unaffected","versionType":"semver"},{"version":"6.12.2","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.13","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.11.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.12.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/bd8524148dd8c123334b066faa90590ba2ef8e6f"},{"url":"https://git.kernel.org/stable/c/2e4854599200f4d021df8ae17e69221d7c149f3e"},{"url":"https://git.kernel.org/stable/c/ad4363a24a5746b257c0beb5d8cc68f9b62c173f"},{"url":"https://git.kernel.org/stable/c/f8c989a0c89a75d30f899a7cabdc14d72522bb8d"}],"title":"nfsd: release svc_expkey/svc_export with rcu_work","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2024-53216","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-02-11T15:43:16.959079Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-416","description":"CWE-416 Use After Free"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-02-11T15:45:26.202Z"}}]}}