CVE-2026-89658
CVE CVE-2026-89658EUVD EUVD-2026-76570Published 2026-09-11T19:45:46.000ZLast changed 2026-09-13T06:32:40.000ZCVSS 9.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup nfs40_clean_admin_revoked() takes a stateid reference under clp->cl_lock, drops nn->client_lock, and calls nfsd4_drop_revoked_stid(), which dereferences the stateid's client through s->sc_client->cl_lock. The stateid reference does not pin the client, so a teardown racing the dropped lock can free the client while nfsd4_drop_revoked_stid() is still using it. This cleanup runs from the laundromat, so a periodic sweep can race force_expire_client() driven by a write to the clients/<id>/ctl file. Skip a client that is already expiring and otherwise pin it with cl_rpc_users under client_lock before dropping the lock, matching nfsd4_revoke_states().
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.3-rc1; d688d8585e6bea5e4e37f7497feea93b6b0a469c <0ae0d2b5c5a1b39c0b3c15d96b32a5b0c583d519; 6.9; d688d8585e6bea5e4e37f7497feea93b6b0a469c <7b4f8a1586c42d3afc3c0ac779af2db7ab1a5c55; patch: 7.2.4; patch: 6.18.50; patch: 0; d688d8585e6bea5e4e37f7497feea93b6b0a469c <b413ec5b23e3445dc9c4f273116078e2d4747626; patch: 6.12.109; d688d8585e6bea5e4e37f7497feea93b6b0a469c <81cf7f1413862f87b078920c838460a6a88aa030
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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