Vulnerability Database

318,756

Total vulnerabilities in the database

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.

  • Published: Jul 4, 2025
  • Updated: Dec 19, 2025
  • CVE: CVE-2025-38231
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.5
  • AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWEs:

Software From Fixed in
linux / linux_kernel 5.10.220 5.10.239
linux / linux_kernel 5.14 5.15.186
linux / linux_kernel 5.16 6.1.142
linux / linux_kernel 6.2 6.6.95
linux / linux_kernel 6.7 6.12.35
linux / linux_kernel 6.13 6.15.4
debian / debian_linux 11.0 11.0.x