CVE-2025-38232NFSD: fix race between nfsd registration and exports_proc
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: NFSD: fix race between nfsd registration and exports_proc As of now nfsd calls create_proc_exports_entry() at start of init_nfsd and cleanup by remove_proc_entry() at last of exit_nfsd. Which causes kernel OOPs if there is race between below 2 operations: (i) exportfs -r (ii) mount -t nfsd none /proc/fs/nfsd for 5.4 kernel ARM64: CPU 1: el1_irq+0xbc/0x180 arch_counter_get_cntvct+0x14/0x18 running_clock+0xc/0x18 preempt_count_add+0x88/0x110 prep_new_page+0xb0/0x220 get_page_from_freelist+0x2d8/0x1778 __alloc_pages_nodemask+0x15c/0xef0 __vmalloc_node_range+0x28c/0x478 __vmalloc_node_flags_caller+0x8c/0xb0 kvmalloc_node+0x88/0xe0 nfsd_init_net+0x6c/0x108 [nfsd] ops_init+0x44/0x170 register_pernet_operations+0x114/0x270 register_pernet_subsys+0x34/0x50 init_nfsd+0xa8/0x718 [nfsd] do_one_initcall+0x54/0x2e0 CPU 2 : Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 PC is at : exports_net_open+0x50/0x68 [nfsd] Call trace: exports_net_open+0x50/0x68 [nfsd] exports_proc_open+0x2c/0x38 [nfsd] proc_reg_open+0xb8/0x198 do_dentry_open+0x1c4/0x418 vfs_open+0x38/0x48 path_openat+0x28c/0xf18 do_filp_open+0x70/0xe8 do_sys_open+0x154/0x248 Sometimes it crashes at exports_net_open() and sometimes cache_seq_next_rcu(). and same is happening on latest 6.14 kernel as well: [ 0.000000] Linux version 6.14.0-rc5-next-20250304-dirty ... [ 285.455918] Unable to handle kernel paging request at virtual address 00001f4800001f48 ... [ 285.464902] pc : cache_seq_next_rcu+0x78/0xa4 ... [ 285.469695] Call trace: [ 285.470083] cache_seq_next_rcu+0x78/0xa4 (P) [ 285.470488] seq_read+0xe0/0x11c [ 285.470675] proc_reg_read+0x9c/0xf0 [ 285.470874] vfs_read+0xc4/0x2fc [ 285.471057] ksys_read+0x6c/0xf4 [ 285.471231] __arm64_sys_read+0x1c/0x28 [ 285.471428] invoke_syscall+0x44/0x100 [ 285.471633] el0_svc_common.constprop.0+0x40/0xe0 [ 285.471870] do_el0_svc_compat+0x1c/0x34 [ 285.472073] el0_svc_compat+0x2c/0x80 [ 285.472265] el0t_32_sync_handler+0x90/0x140 [ 285.472473] el0t_32_sync+0x19c/0x1a0 [ 285.472887] Code: f9400885 93407c23 937d7c27 11000421 (f86378a3) [ 285.473422] ---[ end trace 0000000000000000 ]--- It reproduced simply with below script: while [ 1 ] do /exportfs -r done & while [ 1 ] do insmod /nfsd.ko mount -t nfsd none /proc/fs/nfsd umount /proc/fs/nfsd rmmod nfsd done & So exporting interfaces to user space shall be done at last and cleanup at first place. With change there is no Kernel OOPs.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 16 months later
· 16 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 – < 49b57b98fa601ae6cc7897bab4515129da8290f7
- affected bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 – < 88d6785c173a7c4de05bef8c4fd8a9b42ead02d5
- affected bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 – < 8120e420013d947c890f358f30a2d98ba8ac20bc
- affected bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 – < 2029ca75cdfa6a25716a5a76b751486cce7e3822
- affected bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 – < 327011a2bb4f7de9c72b891a96ce8d902828bddf
- affected bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 – < f7fb730cac9aafda8b9813b55d04e28a9664d17c
- affected 8677e99150b0830d29cc1318b4cc559e176940bb
- affected 7c7cb07d4affcf41749234fe9dc4d90cd3959e32
- affected 4d41f65efeec0a6da6088341203c81e49ebfcd90
- affected 5.4.102 – < 5.5
- affected 5.10.20 – < 5.11
- affected 5.11.3 – < 5.12
- affected 5.12
- unaffected < 5.12
- unaffected 5.15.199 – ≤ 5.15.*
- unaffected 6.1.162 – ≤ 6.1.*
- unaffected 6.6.122 – ≤ 6.6.*
- unaffected 6.12.35 – ≤ 6.12.*
- unaffected 6.15.4 – ≤ 6.15.*
- unaffected 6.16 – ≤ *
References
References8
- https://git.kernel.org/stable/c/49b57b98fa601ae6cc7897bab4515129da8290f7 (opens in a new tab)
- https://git.kernel.org/stable/c/88d6785c173a7c4de05bef8c4fd8a9b42ead02d5 (opens in a new tab)
- https://git.kernel.org/stable/c/8120e420013d947c890f358f30a2d98ba8ac20bc (opens in a new tab)
- https://git.kernel.org/stable/c/2029ca75cdfa6a25716a5a76b751486cce7e3822 (opens in a new tab)
- https://git.kernel.org/stable/c/327011a2bb4f7de9c72b891a96ce8d902828bddf (opens in a new tab)
- https://git.kernel.org/stable/c/f7fb730cac9aafda8b9813b55d04e28a9664d17c (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-20024 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38232)Record last updated .