CVE-2026-89703

CVE CVE-2026-89703EUVD EUVD-2026-76615Published 2026-09-11T19:46:20.000ZLast changed 2026-09-13T06:33:24.000ZCVSS 9.8

What the advisory describes

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().

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 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <650d370cfbc66a96dd14d517bd704689b5bda4e5; 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <a6d89032e5c6620d5bb44582a72555ce07bf1c2e; 6.11.6 <6.12; patch: 7.3-rc1; 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <1e4795766719ffd74b8cf0f2fde4a1350f8326bf; 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a <d832a0587528853d45481d1faf75d4b5d062adaf; patch: 7.2.4; patch: 0; patch: 6.12.109; 6.12; 967faa26f313a62e7bebc55d5b8122eaee43b929; patch: 6.18.50

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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