UNKNOWN NVD
CVE-2026-89694
In the Linux kernel, the following vulnerability has been resolved: nfsd: check client ownership when cancelling a copy-notify stateid On the OFFLOAD_CANCEL p
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.
References
- https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf
- https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c
- https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25
- https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2
This unknown severity vulnerability was published on 2026-09-11 via NVD.
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