CVE-2026-89694nfsd: check client ownership when cancelling a copy-notify stateid
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: nfsd: check client ownership when cancelling a copy-notify stateid On the OFFLOAD_CANCEL path (clp != NULL), manage_cpntf_state() freed the target cpntf state without checking ownership. The lookup key st->si_opaque.so_id is allocated cyclically (guessable) and the embedded clientid is the fixed per-net nn->s2s_cp_cl_id, so any authenticated NFSv4.2 client could cancel and free another client's copy-notify stateid. Compare the creating clientid recorded in state->cp_p_clid against the requesting client's cl_clientid and return nfserr_bad_stateid on a mismatch instead of freeing the entry.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ce0887ac96d35c7105090e166bb0807dc0a0e838 before 88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9; from ce0887ac96d35c7105090e166bb0807dc0a0e838 before 81b2cfe767943922eca906a2a5af23a0ce5d0f35; from ce0887ac96d35c7105090e166bb0807dc0a0e838 before 6bba72b8ee68ad631b94bd439592cba46de54d7d; from ce0887ac96d35c7105090e166bb0807dc0a0e838 before 75268f6cfe26b09a7e4d3216367e87fe9e2a26aa; from ce0887ac96d35c7105090e166bb0807dc0a0e838 before b1eca07303594ca27f5dc360a6946bd7e1f5b04c; from ce0887ac96d35c7105090e166bb0807dc0a0e838 before b42dc26a14b4ad5d6daaada11ec4c70744141c25; from ce0887ac96d35c7105090e166bb0807dc0a0e838 before d801906165cb5cc250d5cbe44935594e170be3e2; from ce0887ac96d35c7105090e166bb0807dc0a0e838 before 6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf | CNA record |
References
- https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9
- https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35
- https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d
- https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa
- https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c
- https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25
- https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2
- https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.