CVE-2025-37876
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-37876
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37876.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-37876
- Downstream
- Published
- 2025-05-09T06:45:40.934Z
- Modified
- 2025-11-20T08:45:34.320603Z
- Summary
- netfs: Only create /proc/fs/netfs with CONFIG_PROC_FS
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfs: Only create /proc/fs/netfs with CONFIGPROCFS
When testing a special config:
CONFIGNETFSSUPPORTS=y CONFIGPROCFS=n
The system crashes with something like:
[ 3.766197] ------------[ cut here ]------------ [ 3.766484] kernel BUG at mm/mempool.c:560! [ 3.766789] Oops: invalid opcode: 0000 [#1] SMP NOPTI [ 3.767123] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W [ 3.767777] Tainted: [W]=WARN [ 3.767968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), [ 3.768523] RIP: 0010:mempoolallocslab.cold+0x17/0x19 [ 3.768847] Code: 50 fe ff 58 5b 5d 41 5c 41 5d 41 5e 41 5f e9 93 95 13 00 [ 3.769977] RSP: 0018:ffffc90000013998 EFLAGS: 00010286 [ 3.770315] RAX: 000000000000002f RBX: ffff888100ba8640 RCX: 0000000000000000 [ 3.770749] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 00000000ffffffff [ 3.771217] RBP: 0000000000092880 R08: 0000000000000000 R09: ffffc90000013828 [ 3.771664] R10: 0000000000000001 R11: 00000000ffffffea R12: 0000000000092cc0 [ 3.772117] R13: 0000000000000400 R14: ffff8881004b1620 R15: ffffea0004ef7e40 [ 3.772554] FS: 0000000000000000(0000) GS:ffff8881b5f3c000(0000) knlGS:0000000000000000 [ 3.773061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.773443] CR2: ffffffff830901b4 CR3: 0000000004296001 CR4: 0000000000770ef0 [ 3.773884] PKRU: 55555554 [ 3.774058] Call Trace: [ 3.774232] <TASK> [ 3.774371] mempoolallocnoprof+0x6a/0x190 [ 3.774649] ? printk+0x57/0x80 [ 3.774862] netfsallocrequest+0x85/0x2ce [ 3.775147] netfsreadahead+0x28/0x170 [ 3.775395] readpages+0x6c/0x350 [ 3.775623] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 3.775928] pagecacheraunbounded+0x1bd/0x2a0 [ 3.776247] filemapgetpages+0x139/0x970 [ 3.776510] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 3.776820] filemapread+0xf9/0x580 [ 3.777054] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 3.777368] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 3.777674] ? findheldlock+0x32/0x90 [ 3.777929] ? netfsstartioread+0x19/0x70 [ 3.778221] ? netfsstartioread+0x19/0x70 [ 3.778489] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 3.778800] ? lockacquired+0x1e6/0x450 [ 3.779054] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 3.779379] netfsbufferedreaditer+0x57/0x80 [ 3.779670] _kernelread+0x158/0x2c0 [ 3.779927] bprmexecve+0x300/0x7a0 [ 3.780185] kernelexecve+0x10c/0x140 [ 3.780423] ? _pfxkernelinit+0x10/0x10 [ 3.780690] kernelinit+0xd5/0x150 [ 3.780910] retfromfork+0x2d/0x50 [ 3.781156] ? _pfxkernelinit+0x10/0x10 [ 3.781414] retfromfork_asm+0x1a/0x30 [ 3.781677] </TASK> [ 3.781823] Modules linked in: [ 3.782065] ---[ end trace 0000000000000000 ]---
This is caused by the following error path in netfs_init():
if (!proc_mkdir("fs/netfs", NULL)) goto error_proc;Fix this by adding ifdef in netfsmain(), so that /proc/fs/netfs is only created with CONFIGPROC_FS.
- References
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
-
Introduced7eb5b3e3a0a55f2d166ca949ef47ca6e0c704aabFixed2ef6eea2efce01d1956ace483216f6b6e26330c9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7eb5b3e3a0a55f2d166ca949ef47ca6e0c704aabFixed6c4c5e0b96a90f2a11c378e66edc1f25165e10b6
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7eb5b3e3a0a55f2d166ca949ef47ca6e0c704aabFixed40cb48eba3b4b79e110c1a35d33a48cac54507a2
Affected versions
v6.*
Database specific
vanir_signatures
[
{
"id": "CVE-2025-37876-2580078e",
"target": {
"file": "fs/netfs/main.c"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
"66663120675279495097479055308300141724",
"192598622620707790352064036163915039190",
"144772593990072642861319738499895183146",
"240935200216074431992103116945593251982",
"7903070139635660549072798883152336560",
"205099877345965013427903888096081132074",
"155757865150561461146772744204827366857",
"21191245738546955873897583037399400849",
"72728213047891909918509572915456887473",
"143232720831200982225361465866511535757",
"71895811767959013820302506117463929857",
"302880132136584683151353308778642777628",
"254605295699506584120104228159007617404",
"181366094365838498493378292059499281874",
"339003352435071206614644273675522009552"
]
},
"deprecated": false,
"signature_type": "Line",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2ef6eea2efce01d1956ace483216f6b6e26330c9",
"signature_version": "v1"
},
{
"id": "CVE-2025-37876-531d1d12",
"target": {
"file": "fs/netfs/main.c",
"function": "netfs_init"
},
"digest": {
"length": 1273.0,
"function_hash": "169273118046783483961548863781015997447"
},
"deprecated": false,
"signature_type": "Function",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2ef6eea2efce01d1956ace483216f6b6e26330c9",
"signature_version": "v1"
}
]