CVE-2026-89669nfsd: initialize copy-notify stateid before publishing it
- 9.8CriticalCVSS base score
- 0.69%Exploitation in 30 daysEPSS · top 47% 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: initialize copy-notify stateid before publishing it nfsd4_copy_notify() finished initializing the cpntf state after nfs4_alloc_init_cpntf_state() had already linked it into the s2s_cp_stateids IDR and the parent's sc_cp_list, with cs_count == 1 (the membership reference) and none held for the caller. A racing OFFLOAD_CANCEL (crafted cl_id == nn->s2s_cp_cl_id plus the guessable so_id) could reach manage_cpntf_state() and free the entry, turning the caller's subsequent cpn_cnr_stateid read and cp_p_stateid/cp_p_clid writes into use-after-free. The owning clientid was also only recorded after publication, so it could not gate an ownership check in that window. Record cp_p_stateid and cp_p_clid inside nfs4_alloc_init_cpntf_state() before nfs4_init_cp_state() publishes the entry, and return it with an extra reference. The caller reads the stateid under that reference and drops it with nfs4_put_cpntf_state(); on a late error the laundromat reaps 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.69% · top 47% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < 863b6e995665472f2af5be2436a874ab6a9e5ac6
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < d18d36395d973ef7372c8e6724970585f75b5c0b
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < 4415a692346a39fdb647cbd717eda510159aaf55
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < 9caad13b7cfe9ccb90cc405ac77335800e086595
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < e08a3dcaca0505f861e344a387f37f94d95dbdc2
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < a4d7fedcaaf33e60a01e53eafca9041ef966212f
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < 4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b
- affected 624322f1adc58acd0b69f77a6ddc764207e97241 – < 129643893b79f8a3c6b72045f933fbab5ee424ca
- 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/863b6e995665472f2af5be2436a874ab6a9e5ac6 (opens in a new tab)
- https://git.kernel.org/stable/c/d18d36395d973ef7372c8e6724970585f75b5c0b (opens in a new tab)
- https://git.kernel.org/stable/c/4415a692346a39fdb647cbd717eda510159aaf55 (opens in a new tab)
- https://git.kernel.org/stable/c/9caad13b7cfe9ccb90cc405ac77335800e086595 (opens in a new tab)
- https://git.kernel.org/stable/c/e08a3dcaca0505f861e344a387f37f94d95dbdc2 (opens in a new tab)
- https://git.kernel.org/stable/c/a4d7fedcaaf33e60a01e53eafca9041ef966212f (opens in a new tab)
- https://git.kernel.org/stable/c/4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b (opens in a new tab)
- https://git.kernel.org/stable/c/129643893b79f8a3c6b72045f933fbab5ee424ca (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-2026-76581 (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-2026-89669)Record last updated .