CVE-2026-89703nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations nfsd4_drop_revoked_stid() handles FREE_STATEID for admin-revoked delegations but does not set SC_STATUS_FREED before releasing cl_lock. revoke_delegation() uses this flag to detect whether FREE_STATEID has already processed the delegation -- without it, the freed delegation is added to cl_revoked via list_add(), producing a use-after-free when cl_revoked is later traversed in __destroy_client(). The SC_STATUS_REVOKED path in nfsd4_free_stateid() (line 7983) already sets SC_STATUS_FREED correctly. Apply the same pattern to the SC_STATUS_ADMIN_REVOKED path in nfsd4_drop_revoked_stid().
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a before d832a0587528853d45481d1faf75d4b5d062adaf; 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a builds before 1e4795766719ffd74b8cf0f2fde4a1350f8326bf; from 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a before a6d89032e5c6620d5bb44582a72555ce07bf1c2e; from 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a before 650d370cfbc66a96dd14d517bd704689b5bda4e5; 967faa26f313a62e7bebc55d5b8122eaee43b929; from 6.11.6 before 6.12 | CNA record |
References
- https://git.kernel.org/stable/c/d832a0587528853d45481d1faf75d4b5d062adaf
- https://git.kernel.org/stable/c/1e4795766719ffd74b8cf0f2fde4a1350f8326bf
- https://git.kernel.org/stable/c/a6d89032e5c6620d5bb44582a72555ce07bf1c2e
- https://git.kernel.org/stable/c/650d370cfbc66a96dd14d517bd704689b5bda4e5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.