{"id":3757,"date":"2025-05-09T02:34:29","date_gmt":"2025-05-09T02:34:29","guid":{"rendered":"http:\/\/localhost\/?p=3757"},"modified":"2025-05-09T02:34:29","modified_gmt":"2025-05-09T02:34:29","slug":"cve-2025-37876","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=3757","title":{"rendered":"CVE-2025-37876"},"content":{"rendered":"
\n

Vulnerability Details<\/h2>\n
\n

Basic Information<\/h3>\n\n\n\n\n\n\n
Title<\/th>\nCVE-2025-37876<\/td>\n<\/tr>\n
Type<\/th>\ncve<\/td>\n<\/tr>\n
Published<\/th>\n2025-05-09T07:16:08<\/td>\n<\/tr>\n
Last Seen<\/th>\n2025-05-09T07:28:34<\/td>\n<\/tr>\n
CVSS Score<\/th>\n0.0 ()<\/td>\n<\/tr>\n<\/table><\/div>\n
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CVSS v3 Details<\/h3>\n\n\n\n\n\n\n\n\n\n
Attack Vector<\/th>\n<\/td>\n<\/tr>\n
Attack Complexity<\/th>\n<\/td>\n<\/tr>\n
Privileges Required<\/th>\n<\/td>\n<\/tr>\n
User Interaction<\/th>\n<\/td>\n<\/tr>\n
Scope<\/th>\n<\/td>\n<\/tr>\n
Confidentiality Impact<\/th>\n<\/td>\n<\/tr>\n
Integrity Impact<\/th>\n<\/td>\n<\/tr>\n
Availability Impact<\/th>\n<\/td>\n<\/tr>\n<\/table><\/div>\n
\n

CVE Information<\/h3>\n\n\n\n\n
CVE IDs<\/th>\nCVE-2025-37876<\/td>\n<\/tr>\n
CWE<\/th>\n<\/td>\n<\/tr>\n
Bulletin Family<\/th>\ncve<\/td>\n<\/tr>\n<\/table><\/div>\n
\n

Description<\/h3>\n
\n In the Linux kernel, the following vulnerability has been resolved:<\/p>\n

netfs: Only create \/proc\/fs\/netfs with CONFIG_PROC_FS<\/p>\n

When testing a special config:<\/p>\n

CONFIG_NETFS_SUPPORTS=y
\nCONFIG_PROC_FS=n<\/p>\n

The system crashes with something like:<\/p>\n

[ 3.766197] ————[ cut here ]————
\n[ 3.766484] kernel BUG at mm\/mempool.c:560!
\n[ 3.766789] Oops: invalid opcode: 0000 [#1] SMP NOPTI
\n[ 3.767123] CPU: 0 UID: 0 PID: 1 Comm: swapper\/0 Tainted: G W
\n[ 3.767777] Tainted: [W]=WARN
\n[ 3.767968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
\n[ 3.768523] RIP: 0010:mempool_alloc_slab.cold+0x17\/0x19
\n[ 3.768847] Code: 50 fe ff 58 5b 5d 41 5c 41 5d 41 5e 41 5f e9 93 95 13 00
\n[ 3.769977] RSP: 0018:ffffc90000013998 EFLAGS: 00010286
\n[ 3.770315] RAX: 000000000000002f RBX: ffff888100ba8640 RCX: 0000000000000000
\n[ 3.770749] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 00000000ffffffff
\n[ 3.771217] RBP: 0000000000092880 R08: 0000000000000000 R09: ffffc90000013828
\n[ 3.771664] R10: 0000000000000001 R11: 00000000ffffffea R12: 0000000000092cc0
\n[ 3.772117] R13: 0000000000000400 R14: ffff8881004b1620 R15: ffffea0004ef7e40
\n[ 3.772554] FS: 0000000000000000(0000) GS:ffff8881b5f3c000(0000) knlGS:0000000000000000
\n[ 3.773061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
\n[ 3.773443] CR2: ffffffff830901b4 CR3: 0000000004296001 CR4: 0000000000770ef0
\n[ 3.773884] PKRU: 55555554
\n[ 3.774058] Call Trace:
\n[ 3.774232]
\n[ 3.774371] mempool_alloc_noprof+0x6a\/0x190
\n[ 3.774649] ? _printk+0x57\/0x80
\n[ 3.774862] netfs_alloc_request+0x85\/0x2ce
\n[ 3.775147] netfs_readahead+0x28\/0x170
\n[ 3.775395] read_pages+0x6c\/0x350
\n[ 3.775623] ? srso_alias_return_thunk+0x5\/0xfbef5
\n[ 3.775928] page_cache_ra_unbounded+0x1bd\/0x2a0
\n[ 3.776247] filemap_get_pages+0x139\/0x970
\n[ 3.776510] ? srso_alias_return_thunk+0x5\/0xfbef5
\n[ 3.776820] filemap_read+0xf9\/0x580
\n[ 3.777054] ? srso_alias_return_thunk+0x5\/0xfbef5
\n[ 3.777368] ? srso_alias_return_thunk+0x5\/0xfbef5
\n[ 3.777674] ? find_held_lock+0x32\/0x90
\n[ 3.777929] ? netfs_start_io_read+0x19\/0x70
\n[ 3.778221] ? netfs_start_io_read+0x19\/0x70
\n[ 3.778489] ? srso_alias_return_thunk+0x5\/0xfbef5
\n[ 3.778800] ? lock_acquired+0x1e6\/0x450
\n[ 3.779054] ? srso_alias_return_thunk+0x5\/0xfbef5
\n[ 3.779379] netfs_buffered_read_iter+0x57\/0x80
\n[ 3.779670] __kernel_read+0x158\/0x2c0
\n[ 3.779927] bprm_execve+0x300\/0x7a0
\n[ 3.780185] kernel_execve+0x10c\/0x140
\n[ 3.780423] ? __pfx_kernel_init+0x10\/0x10
\n[ 3.780690] kernel_init+0xd5\/0x150
\n[ 3.780910] ret_from_fork+0x2d\/0x50
\n[ 3.781156] ? __pfx_kernel_init+0x10\/0x10
\n[ 3.781414] ret_from_fork_asm+0x1a\/0x30
\n[ 3.781677] <\/TASK>
\n[ 3.781823] Modules linked in:
\n[ 3.782065] —[ end trace 0000000000000000 ]—<\/p>\n

This is caused by the following error path in netfs_init():<\/p>\n

if (!proc_mkdir(“fs\/netfs”, NULL))
\n goto error_proc;<\/p>\n

Fix this by adding ifdef in netfs_main(), so that \/proc\/fs\/netfs is only
\ncreated with CONFIG_PROC_FS.\n <\/p><\/div>\n<\/p><\/div>\n

\n

Impact Assessment<\/h3>\n\n\n\n
Base Score<\/th>\n0.0<\/td>\n<\/tr>\n
Severity<\/th>\n<\/td>\n<\/tr>\n<\/table><\/div>\n
\n

View full CVE details<\/a><\/p>\n<\/p><\/div>\n<\/div>\n