CVE-2025-38231None▾ SunlitIn 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…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= a4bc287943f5695209ff36bdc89f17b48d68fae7 < deaeb74ae9318252829c59a84a7d2316fc335660Linux >= f4e44b393389c77958f7c58bf4415032b4cda15b < 0fccf5f01ed28725cc313a66ca1247eef911d55eLinux >= f4e44b393389c77958f7c58bf4415032b4cda15b < a97668ec6d73dab237cd1c15efe012a10090a4edLinux >= f4e44b393389c77958f7c58bf4415032b4cda15b < 5060e1a5fef184bd11d298e3f0ee920d96a23236Linux >= f4e44b393389c77958f7c58bf4415032b4cda15b < d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0Linux >= f4e44b393389c77958f7c58bf4415032b4cda15b < 83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64Linux >= f4e44b393389c77958f7c58bf4415032b4cda15b < b31da62889e6d610114d81dc7a6edbcaa503fcf8Linux >= 5.10.220 < 5.10.239Linux 5.14Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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