- 8.1HighCVSS base score
- 0.53%Exploitation in 30 daysEPSS · top 55% 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: lockd, nfsd: RCU-protect nlmsvc_ops dispatch nlmsvc_ops is published by nfsd_lockd_init() and cleared by nfsd_lockd_shutdown() with plain stores, while lockd dereferences it unguarded from dispatch sites in fs/lockd/svcsubs.c. The pointer targets nfsd's .rodata and the fopen/fclose callbacks live in nfsd's .text, so a stale load after rmmod nfsd results in either a NULL deref or a module-text use-after-free. Declare nlmsvc_ops as __rcu, publish via rcu_assign_pointer(), clear via RCU_INIT_POINTER() + synchronize_rcu(). Add a struct module *owner field to nlmsvc_binding and pin the module across indirect calls with try_module_get/module_put. When the binding is torn down, fall back to fput() to avoid leaking struct file references.
Timeline
ID reserved
By Linux
Published
- 49 days later
· 49 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 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cc2f0d79b21be69b891cbd1899daf2a1fdf9df87
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 43943532c105ea8fe26039a1347cfda4ac0fcadc
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6e7495972039f212e336e552b58cac9dd54611c3
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 836ce2b99bcce6d68c58edd04efbc5cd1fd581af
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 3c461a1820088fb5889d73a6522369bde45527a9
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 641e5e20852359b8c31149be4598884e30652f60
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/cc2f0d79b21be69b891cbd1899daf2a1fdf9df87 (opens in a new tab)
- https://git.kernel.org/stable/c/43943532c105ea8fe26039a1347cfda4ac0fcadc (opens in a new tab)
- https://git.kernel.org/stable/c/6e7495972039f212e336e552b58cac9dd54611c3 (opens in a new tab)
- https://git.kernel.org/stable/c/836ce2b99bcce6d68c58edd04efbc5cd1fd581af (opens in a new tab)
- https://git.kernel.org/stable/c/3c461a1820088fb5889d73a6522369bde45527a9 (opens in a new tab)
- https://git.kernel.org/stable/c/641e5e20852359b8c31149be4598884e30652f60 (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-2026-76621 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89709)Record last updated .