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CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-38231

nfsd: Initialize ssc before laundromat_work to prevent NULL dereference

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a4bc287943f5695209ff36bdc89f17b48d68fae7 to < deaeb74ae9318252829c59a84a7d2316fc335660affected
  • f4e44b393389c77958f7c58bf4415032b4cda15b to < 0fccf5f01ed28725cc313a66ca1247eef911d55eaffected
  • f4e44b393389c77958f7c58bf4415032b4cda15b to < a97668ec6d73dab237cd1c15efe012a10090a4edaffected
  • f4e44b393389c77958f7c58bf4415032b4cda15b to < 5060e1a5fef184bd11d298e3f0ee920d96a23236affected
  • f4e44b393389c77958f7c58bf4415032b4cda15b to < d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0affected
  • f4e44b393389c77958f7c58bf4415032b4cda15b to < 83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64affected
  • f4e44b393389c77958f7c58bf4415032b4cda15b to < b31da62889e6d610114d81dc7a6edbcaa503fcf8affected
  • 5.10.220 to < 5.10.239affected

Linux Linux

Default version status: affected

  • 5.14affected
  • 0 to < 5.14unaffected
  • 5.10.239 to ≤ 5.10.*unaffected
  • 5.15.186 to ≤ 5.15.*unaffected
  • 6.1.142 to ≤ 6.1.*unaffected
  • 6.6.95 to ≤ 6.6.*unaffected
  • 6.12.35 to ≤ 6.12.*unaffected
  • 6.15.4 to ≤ 6.15.*unaffected
  • 6.16 to ≤ *unaffected

References