NFSD: fix race between nfsd registration and exports_proc
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
CVE-2025-38232
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38232
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7",
"lessThan": "49b57b98fa601ae6cc7897bab4515129da8290f7",
"versionType": "git"
},
{
"status": "affected",
"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7",
"lessThan": "88d6785c173a7c4de05bef8c4fd8a9b42ead02d5",
"versionType": "git"
},
{
"status": "affected",
"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7",
"lessThan": "8120e420013d947c890f358f30a2d98ba8ac20bc",
"versionType": "git"
},
{
"status": "affected",
"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7",
"lessThan": "2029ca75cdfa6a25716a5a76b751486cce7e3822",
"versionType": "git"
},
{
"status": "affected",
"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7",
"lessThan": "327011a2bb4f7de9c72b891a96ce8d902828bddf",
"versionType": "git"
},
{
"status": "affected",
"version": "bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7",
"lessThan": "f7fb730cac9aafda8b9813b55d04e28a9664d17c",
"versionType": "git"
},
{
"status": "affected",
"version": "8677e99150b0830d29cc1318b4cc559e176940bb",
"versionType": "git"
},
{
"status": "affected",
"version": "7c7cb07d4affcf41749234fe9dc4d90cd3959e32",
"versionType": "git"
},
{
"status": "affected",
"version": "4d41f65efeec0a6da6088341203c81e49ebfcd90",
"versionType": "git"
},
{
"status": "affected",
"version": "5.4.102",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.20",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.11.3",
"lessThan": "5.12",
"versionType": "semver"
}
],
"programFiles": [
"fs/nfsd/nfsctl.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.35",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.4",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/nfsd/nfsctl.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38232
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #27026 · Revision 1
- Added to Heist Feed
- Publisher date