{"id":"CVE-2025-38232","revision":"8d55ec2e34d6458c8115e4fcf280761b","records":[{"revision":"8d55ec2e34d6458c8115e4fcf280761b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38232","aliases":[],"title":"NFSD: fix race between nfsd registration and exports_proc","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix race between nfsd registration and exports_proc\n\nAs of now nfsd calls create_proc_exports_entry() at start of init_nfsd\nand cleanup by remove_proc_entry() at last of exit_nfsd.\n\nWhich causes kernel OOPs if there is race between below 2 operations:\n(i) exportfs -r\n(ii) mount -t nfsd none /proc/fs/nfsd\n\nfor 5.4 kernel ARM64:\n\nCPU 1:\nel1_irq+0xbc/0x180\narch_counter_get_cntvct+0x14/0x18\nrunning_clock+0xc/0x18\npreempt_count_add+0x88/0x110\nprep_new_page+0xb0/0x220\nget_page_from_freelist+0x2d8/0x1778\n__alloc_pages_nodemask+0x15c/0xef0\n__vmalloc_node_range+0x28c/0x478\n__vmalloc_node_flags_caller+0x8c/0xb0\nkvmalloc_node+0x88/0xe0\nnfsd_init_net+0x6c/0x108 [nfsd]\nops_init+0x44/0x170\nregister_pernet_operations+0x114/0x270\nregister_pernet_subsys+0x34/0x50\ninit_nfsd+0xa8/0x718 [nfsd]\ndo_one_initcall+0x54/0x2e0\n\nCPU 2 :\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n\nPC is at : exports_net_open+0x50/0x68 [nfsd]\n\nCall trace:\nexports_net_open+0x50/0x68 [nfsd]\nexports_proc_open+0x2c/0x38 [nfsd]\nproc_reg_open+0xb8/0x198\ndo_dentry_open+0x1c4/0x418\nvfs_open+0x38/0x48\npath_openat+0x28c/0xf18\ndo_filp_open+0x70/0xe8\ndo_sys_open+0x154/0x248\n\nSometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu().\n\nand same is happening on latest 6.14 kernel as well:\n\n[ 0.000000] Linux version 6.14.0-rc5-next-20250304-dirty\n...\n[ 285.455918] Unable to handle kernel paging request at virtual address 00001f4800001f48\n...\n[ 285.464902] pc : cache_seq_next_rcu+0x78/0xa4\n...\n[ 285.469695] Call trace:\n[ 285.470083] cache_seq_next_rcu+0x78/0xa4 (P)\n[ 285.470488] seq_read+0xe0/0x11c\n[ 285.470675] proc_reg_read+0x9c/0xf0\n[ 285.470874] vfs_read+0xc4/0x2fc\n[ 285.471057] ksys_read+0x6c/0xf4\n[ 285.471231] __arm64_sys_read+0x1c/0x28\n[ 285.471428] invoke_syscall+0x44/0x100\n[ 285.471633] el0_svc_common.constprop.0+0x40/0xe0\n[ 285.471870] do_el0_svc_compat+0x1c/0x34\n[ 285.472073] el0_svc_compat+0x2c/0x80\n[ 285.472265] el0t_32_sync_handler+0x90/0x140\n[ 285.472473] el0t_32_sync+0x19c/0x1a0\n[ 285.472887] Code: f9400885 93407c23 937d7c27 11000421 (f86378a3)\n[ 285.473422] ---[ end trace 0000000000000000 ]---\n\nIt reproduced simply with below script:\nwhile [ 1 ]\ndo\n/exportfs -r\ndone &\n\nwhile [ 1 ]\ndo\ninsmod /nfsd.ko\nmount -t nfsd none /proc/fs/nfsd\numount /proc/fs/nfsd\nrmmod nfsd\ndone &\n\nSo exporting interfaces to user space shall be done at last and\ncleanup at first place.\n\nWith change there is no Kernel OOPs.","state":0,"publishedAt":"2025-07-04T13:37:45.635+00:00","modifiedAt":"2026-10-15T01:06:55.267+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/nfsd/nfsctl.c\"\n ],\n \"versions\": [\n {\n \"version\": \"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7\",\n \"lessThan\": \"49b57b98fa601ae6cc7897bab4515129da8290f7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7\",\n \"lessThan\": \"88d6785c173a7c4de05bef8c4fd8a9b42ead02d5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7\",\n \"lessThan\": \"8120e420013d947c890f358f30a2d98ba8ac20bc\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7\",\n \"lessThan\": \"2029ca75cdfa6a25716a5a76b751486cce7e3822\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7\",\n \"lessThan\": \"327011a2bb4f7de9c72b891a96ce8d902828bddf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7\",\n \"lessThan\": \"f7fb730cac9aafda8b9813b55d04e28a9664d17c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8677e99150b0830d29cc1318b4cc559e176940bb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7c7cb07d4affcf41749234fe9dc4d90cd3959e32\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4d41f65efeec0a6da6088341203c81e49ebfcd90\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.4.102\",\n \"lessThan\": \"5.5\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.20\",\n \"lessThan\": \"5.11\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.11.3\",\n \"lessThan\": \"5.12\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/nfsd/nfsctl.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.12\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.12\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.199\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.162\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.122\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.35\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.15.4\",\n \"lessThanOrEqual\": \"6.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.16\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/49b57b98fa601ae6cc7897bab4515129da8290f7","https://git.kernel.org/stable/c/88d6785c173a7c4de05bef8c4fd8a9b42ead02d5","https://git.kernel.org/stable/c/8120e420013d947c890f358f30a2d98ba8ac20bc","https://git.kernel.org/stable/c/2029ca75cdfa6a25716a5a76b751486cce7e3822","https://git.kernel.org/stable/c/327011a2bb4f7de9c72b891a96ce8d902828bddf","https://git.kernel.org/stable/c/f7fb730cac9aafda8b9813b55d04e28a9664d17c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38232","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38232","identifiers":["CVE-2025-38232"]},"retained":false,"historicalAffected":[]}],"coverage":[]}