CVE-2026-89669

CVE CVE-2026-89669EUVD EUVD-2026-76581Published 2026-09-11T19:45:55.000ZLast changed 2026-09-14T12:01:55.000ZCVSS 9.8

What the advisory describes

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.

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 624322f1adc58acd0b69f77a6ddc764207e97241 <d18d36395d973ef7372c8e6724970585f75b5c0b; 624322f1adc58acd0b69f77a6ddc764207e97241 <a4d7fedcaaf33e60a01e53eafca9041ef966212f; patch: 6.18.50; 624322f1adc58acd0b69f77a6ddc764207e97241 <9caad13b7cfe9ccb90cc405ac77335800e086595; patch: 6.1.188; patch: 5.15.221; 624322f1adc58acd0b69f77a6ddc764207e97241 <e08a3dcaca0505f861e344a387f37f94d95dbdc2; patch: 7.3-rc1; 624322f1adc58acd0b69f77a6ddc764207e97241 <4415a692346a39fdb647cbd717eda510159aaf55; patch: 0; 624322f1adc58acd0b69f77a6ddc764207e97241 <4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b; 624322f1adc58acd0b69f77a6ddc764207e97241 <129643893b79f8a3c6b72045f933fbab5ee424ca; 5.6; patch: 7.2.4; patch: 6.6.157; patch: 5.10.270; 624322f1adc58acd0b69f77a6ddc764207e97241 <863b6e995665472f2af5be2436a874ab6a9e5ac6; patch: 6.12.109

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

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Linux — Linux

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