CVE-2026-89694nfsd: check client ownership when cancelling a copy-notify stateid
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < 88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < 81b2cfe767943922eca906a2a5af23a0ce5d0f35
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < 6bba72b8ee68ad631b94bd439592cba46de54d7d
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < 75268f6cfe26b09a7e4d3216367e87fe9e2a26aa
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < b1eca07303594ca27f5dc360a6946bd7e1f5b04c
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < b42dc26a14b4ad5d6daaada11ec4c70744141c25
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < d801906165cb5cc250d5cbe44935594e170be3e2
- affected ce0887ac96d35c7105090e166bb0807dc0a0e838 – < 6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf
- affected 5.6
- unaffected < 5.6
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9 (opens in a new tab)
- https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35 (opens in a new tab)
- https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d (opens in a new tab)
- https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa (opens in a new tab)
- https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c (opens in a new tab)
- https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25 (opens in a new tab)
- https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2 (opens in a new tab)
- https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76606 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-89694)Record last updated .