CVE-2025-38231

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-38231
In the Linux kernel, the following vulnerability has been resolved: nfsd: Initialize ssc before laundromat_work to prevent NULL dereference In nfs4_state_start_net(), laundromat_work may access nfsd_ssc through nfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized, this can cause NULL pointer dereference. Normally the delayed start of laundromat_work allows sufficient time for nfsd_ssc initialization to complete. However, when the kernel waits too long for userspace responses (e.g. in nfs4_state_start_net -> nfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done -> cld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the delayed work may start before nfsd_ssc initialization finishes. Fix this by moving nfsd_ssc initialization before starting laundromat_work.

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/0fccf5f01ed28725cc313a66ca1247eef911d55e Patch
https://git.kernel.org/stable/c/5060e1a5fef184bd11d298e3f0ee920d96a23236 Patch
https://git.kernel.org/stable/c/83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64 Patch
https://git.kernel.org/stable/c/a97668ec6d73dab237cd1c15efe012a10090a4ed Patch
https://git.kernel.org/stable/c/b31da62889e6d610114d81dc7a6edbcaa503fcf8 Patch
https://git.kernel.org/stable/c/d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0 Patch
https://git.kernel.org/stable/c/deaeb74ae9318252829c59a84a7d2316fc335660 Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Third Party Advisory Mailing List
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory Mailing List
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:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
History

18 Dec 2025, 19:27

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/0fccf5f01ed28725cc313a66ca1247eef911d55e - () https://git.kernel.org/stable/c/0fccf5f01ed28725cc313a66ca1247eef911d55e - Patch
References () https://git.kernel.org/stable/c/5060e1a5fef184bd11d298e3f0ee920d96a23236 - () https://git.kernel.org/stable/c/5060e1a5fef184bd11d298e3f0ee920d96a23236 - Patch
References () https://git.kernel.org/stable/c/83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64 - () https://git.kernel.org/stable/c/83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64 - Patch
References () https://git.kernel.org/stable/c/a97668ec6d73dab237cd1c15efe012a10090a4ed - () https://git.kernel.org/stable/c/a97668ec6d73dab237cd1c15efe012a10090a4ed - Patch
References () https://git.kernel.org/stable/c/b31da62889e6d610114d81dc7a6edbcaa503fcf8 - () https://git.kernel.org/stable/c/b31da62889e6d610114d81dc7a6edbcaa503fcf8 - Patch
References () https://git.kernel.org/stable/c/d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0 - () https://git.kernel.org/stable/c/d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0 - Patch
References () https://git.kernel.org/stable/c/deaeb74ae9318252829c59a84a7d2316fc335660 - () https://git.kernel.org/stable/c/deaeb74ae9318252829c59a84a7d2316fc335660 - Patch
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - Third Party Advisory, Mailing List
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory, Mailing List
CPE cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Debian
Debian debian Linux
Linux linux Kernel
CWE CWE-476

03 Nov 2025, 18:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html -
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html -

08 Jul 2025, 16:18

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: Inicializar ssc antes de laundromat_work para evitar la desreferencia de punteros NULL. En nfs4_state_start_net(), laundromat_work puede acceder a nfsd_ssc a través de nfs4_laundromat -> nfsd4_ssc_expire_umount. Si nfsd_ssc no se inicializa, esto puede causar la desreferencia de punteros NULL. Normalmente, el inicio retrasado de laundromat_work permite que la inicialización de nfsd_ssc se complete con tiempo suficiente. Sin embargo, cuando el núcleo espera demasiado tiempo las respuestas del espacio de usuario (p. ej., en la ruta nfs4_state_start_net -> nfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done -> cld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion), el trabajo retrasado puede comenzar antes de que finalice la inicialización de nfsd_ssc. Para solucionar esto, mueva la inicialización de nfsd_ssc antes de iniciar laundromat_work.

04 Jul 2025, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-04 14:15

Updated : 2025-12-18 19:27

NVD link : CVE-2025-38231

Mitre link : CVE-2025-38231

CVE.ORG link : CVE-2025-38231

JSON object : View

Products Affected

debian

  • debian_linux

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference