CVE-2025-22025

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-22025
In the Linux kernel, the following vulnerability has been resolved: nfsd: put dl_stid if fail to queue dl_recall Before calling nfsd4_run_cb to queue dl_recall to the callback_wq, we increment the reference count of dl_stid. We expect that after the corresponding work_struct is processed, the reference count of dl_stid will be decremented through the callback function nfsd4_cb_recall_release. However, if the call to nfsd4_run_cb fails, the incremented reference count of dl_stid will not be decremented correspondingly, leading to the following nfs4_stid leak: unreferenced object 0xffff88812067b578 (size 344): comm "nfsd", pid 2761, jiffies 4295044002 (age 5541.241s) hex dump (first 32 bytes): 01 00 00 00 6b 6b 6b 6b b8 02 c0 e2 81 88 ff ff ....kkkk........ 00 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 ad 4e ad de .kkkkkkk.....N.. backtrace: kmem_cache_alloc+0x4b9/0x700 nfsd4_process_open1+0x34/0x300 nfsd4_open+0x2d1/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 unreferenced object 0xffff8881499f4d28 (size 368): comm "nfsd", pid 2761, jiffies 4295044005 (age 5541.239s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 30 4d 9f 49 81 88 ff ff ........0M.I.... 30 4d 9f 49 81 88 ff ff 20 00 00 00 01 00 00 00 0M.I.... ....... backtrace: kmem_cache_alloc+0x4b9/0x700 nfs4_alloc_stid+0x29/0x210 alloc_init_deleg+0x92/0x2e0 nfs4_set_delegation+0x284/0xc00 nfs4_open_delegation+0x216/0x3f0 nfsd4_process_open2+0x2b3/0xee0 nfsd4_open+0x770/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 Fix it by checking the result of nfsd4_run_cb and call nfs4_put_stid if fail to queue dl_recall.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/133f5e2a37ce08c82d24e8fba65e0a81deae4609 Patch
https://git.kernel.org/stable/c/230ca758453c63bd38e4d9f4a21db698f7abada8 Patch
https://git.kernel.org/stable/c/63b91c8ff4589f5263873b24c052447a28e10ef7 Patch
https://git.kernel.org/stable/c/9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1 Patch
https://git.kernel.org/stable/c/b874cdef4e67e5150e07eff0eae1cbb21fb92da1 Patch
https://git.kernel.org/stable/c/cad3479b63661a399c9df1d0b759e1806e2df3c8 Patch
https://git.kernel.org/stable/c/cdb796137c57e68ca34518d53be53b679351eb86 Patch
https://git.kernel.org/stable/c/d96587cc93ec369031bcd7658c6adc719873c9fd Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

03 Nov 2025, 20:17

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html -
  • () https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html -

28 Oct 2025, 18:56

Type Values Removed Values Added
CWE CWE-401
First Time Linux linux Kernel
Linux
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: poner dl_stid si no se puede poner en cola dl_recall. Antes de llamar a nfsd4_run_cb para poner en cola dl_recall en callback_wq, incrementamos el recuento de referencia de dl_stid. Esperamos que, tras procesar el work_struct correspondiente, el recuento de referencia de dl_stid se reduzca mediante la función de devolución de llamada nfsd4_cb_recall_release. Sin embargo, si falla la llamada a nfsd4_run_cb, el recuento de referencia incrementado de dl_stid no se reducirá correspondientemente, lo que provocará la siguiente pérdida de nfs4_stid: objeto sin referencia 0xffff88812067b578 (tamaño 344): comm "nfsd", pid 2761, jiffies 4295044002 (edad 5541.241s) volcado hexadecimal (primeros 32 bytes): 01 00 00 00 6b 6b 6b 6b b8 02 c0 e2 81 88 ff ff ....kkkk........ 00 6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 ad 4e ad de .kkkkkkk.....N.. seguimiento inverso: kmem_cache_alloc+0x4b9/0x700 nfsd4_process_open1+0x34/0x300 nfsd4_open+0x2d1/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 objeto sin referencia 0xffff8881499f4d28 (tamaño 368): comm "nfsd", pid 2761, jiffies 4295044005 (edad 5541.239s) volcado hexadecimal (primeros 32 bytes): 01 00 00 00 00 00 00 00 30 4d 9f 49 81 88 ff ff ........0M.I.... 30 4d 9f 49 81 88 ff ff 20 00 00 00 01 00 00 00 0M.I.... ....... seguimiento inverso: kmem_cache_alloc+0x4b9/0x700 nfs4_alloc_stid+0x29/0x210 alloc_init_deleg+0x92/0x2e0 nfs4_set_delegation+0x284/0xc00 nfs4_open_delegation+0x216/0x3f0 nfsd4_process_open2+0x2b3/0xee0 nfsd4_open+0x770/0x9d0 nfsd4_proc_compound+0x7a2/0xe30 nfsd_dispatch+0x241/0x3e0 svc_process_common+0x5d3/0xcc0 svc_process+0x2a3/0x320 nfsd+0x180/0x2e0 kthread+0x199/0x1d0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30 Solucione el problema comprobando el resultado de nfsd4_run_cb y llama a nfs4_put_stid si no se puede poner en cola dl_recall.
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/133f5e2a37ce08c82d24e8fba65e0a81deae4609 - () https://git.kernel.org/stable/c/133f5e2a37ce08c82d24e8fba65e0a81deae4609 - Patch
References () https://git.kernel.org/stable/c/230ca758453c63bd38e4d9f4a21db698f7abada8 - () https://git.kernel.org/stable/c/230ca758453c63bd38e4d9f4a21db698f7abada8 - Patch
References () https://git.kernel.org/stable/c/63b91c8ff4589f5263873b24c052447a28e10ef7 - () https://git.kernel.org/stable/c/63b91c8ff4589f5263873b24c052447a28e10ef7 - Patch
References () https://git.kernel.org/stable/c/9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1 - () https://git.kernel.org/stable/c/9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1 - Patch
References () https://git.kernel.org/stable/c/b874cdef4e67e5150e07eff0eae1cbb21fb92da1 - () https://git.kernel.org/stable/c/b874cdef4e67e5150e07eff0eae1cbb21fb92da1 - Patch
References () https://git.kernel.org/stable/c/cad3479b63661a399c9df1d0b759e1806e2df3c8 - () https://git.kernel.org/stable/c/cad3479b63661a399c9df1d0b759e1806e2df3c8 - Patch
References () https://git.kernel.org/stable/c/cdb796137c57e68ca34518d53be53b679351eb86 - () https://git.kernel.org/stable/c/cdb796137c57e68ca34518d53be53b679351eb86 - Patch
References () https://git.kernel.org/stable/c/d96587cc93ec369031bcd7658c6adc719873c9fd - () https://git.kernel.org/stable/c/d96587cc93ec369031bcd7658c6adc719873c9fd - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

16 Apr 2025, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-16 15:15

Updated : 2025-11-03 20:17

NVD link : CVE-2025-22025

Mitre link : CVE-2025-22025

CVE.ORG link : CVE-2025-22025

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime