CVE-2025-38232
- Source
- https://cve.org/CVERecord?id=CVE-2025-38232
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38232.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-38232
- Downstream
BELL (1)
ECHO (1)
MINI (1)
openSUSE (1)
ROOT (4)
UBUNTU (1)
- Related
- Published
- 2025-07-04T13:37:45Z
- Modified
- 2026-10-20T10:30:19Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- NFSD: fix race between nfsd registration and exports_proc
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38232.json" }- References
-
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://git.kernel.org/stable/c/2029ca75cdfa6a25716a5a76b751486cce7e3822
- https://git.kernel.org/stable/c/327011a2bb4f7de9c72b891a96ce8d902828bddf
- https://git.kernel.org/stable/c/49b57b98fa601ae6cc7897bab4515129da8290f7
- https://git.kernel.org/stable/c/8120e420013d947c890f358f30a2d98ba8ac20bc
- https://git.kernel.org/stable/c/88d6785c173a7c4de05bef8c4fd8a9b42ead02d5
- https://git.kernel.org/stable/c/f7fb730cac9aafda8b9813b55d04e28a9664d17c
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38232.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-38232
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / 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
-
Introducedbd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7Fixed49b57b98fa601ae6cc7897bab4515129da8290f7Fixed88d6785c173a7c4de05bef8c4fd8a9b42ead02d5Fixed8120e420013d947c890f358f30a2d98ba8ac20bcFixed2029ca75cdfa6a25716a5a76b751486cce7e3822Fixed327011a2bb4f7de9c72b891a96ce8d902828bddfFixedf7fb730cac9aafda8b9813b55d04e28a9664d17c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.4.102Fixed5.5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.10.20Fixed5.11
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.11.3Fixed5.12
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced8677e99150b0830d29cc1318b4cc559e176940bb
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7c7cb07d4affcf41749234fe9dc4d90cd3959e32
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4d41f65efeec0a6da6088341203c81e49ebfcd90
Affected versions
v5.*
Linux / Kernel
Package
- Name
- Kernel