CVE-2026-89694
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
4- osv-coords2 versions
>= 5.6.0, < 5.10.270+ 1 more
- (no CPE)range: >= 5.6.0, < 5.10.270
- (no CPE)range: < 7.2.6-1.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7dnvd
- git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bfnvd
- git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aanvd
- git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35nvd
- git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9nvd
- git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04cnvd
- git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25nvd
- git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2nvd
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