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
2025-05-09T06:45:40Z
Modified
2025-10-16T00:21:25.324914Z
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
Introduced
7eb5b3e3a0a55f2d166ca949ef47ca6e0c704aab
Fixed
2ef6eea2efce01d1956ace483216f6b6e26330c9
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
7eb5b3e3a0a55f2d166ca949ef47ca6e0c704aab
Fixed
6c4c5e0b96a90f2a11c378e66edc1f25165e10b6
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
7eb5b3e3a0a55f2d166ca949ef47ca6e0c704aab
Fixed
40cb48eba3b4b79e110c1a35d33a48cac54507a2

Affected versions

v6.*

v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.12
v6.12-rc1
v6.12-rc2
v6.12-rc3
v6.12-rc4
v6.12-rc5
v6.12-rc6
v6.12-rc7
v6.12.1
v6.12.10
v6.12.11
v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.18
v6.12.19
v6.12.2
v6.12.20
v6.12.21
v6.12.22
v6.12.23
v6.12.24
v6.12.25
v6.12.3
v6.12.4
v6.12.5
v6.12.6
v6.12.7
v6.12.8
v6.12.9
v6.13
v6.13-rc1
v6.13-rc2
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.14
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
v6.14-rc6
v6.14-rc7
v6.14.1
v6.14.2
v6.14.3
v6.14.4
v6.15-rc1
v6.7
v6.7-rc8
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.8.0
Fixed
6.12.26
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.14.5