Answer in brief
CVE-2026-89669 records a Critical severity (CVSS 9.8) vulnerability in nfsd: initialize copy-notify stateid before publishing it. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=624322f1adc58acd0b69f77a6ddc764207e97241 <e08a3dcaca0505f861e344a387f37f94d95dbdc2 || >=624322f1adc58acd0b69f77a6ddc764207e97241 <a4d7fedcaaf33e60a01e53eafca9041ef966212f || >=624322f1adc58acd0b69f77a6ddc764207e97241 <4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b || >=624322f1adc58acd0b69f77a6ddc764207e97241 <129643893b79f8a3c6b72045f933fbab5ee424ca | e08a3dcaca0505f861e344a387f37f94d95dbdc2, a4d7fedcaaf33e60a01e53eafca9041ef966212f, 4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b, 129643893b79f8a3c6b72045f933fbab5ee424ca |
| Linux/Linuxgeneric | 5.6 | Not reported |
| Linux/Linuxgeneric | >=624322f1adc58acd0b69f77a6ddc764207e97241 <863b6e995665472f2af5be2436a874ab6a9e5ac6 || >=624322f1adc58acd0b69f77a6ddc764207e97241 <d18d36395d973ef7372c8e6724970585f75b5c0b || >=624322f1adc58acd0b69f77a6ddc764207e97241 <4415a692346a39fdb647cbd717eda510159aaf55 || >=624322f1adc58acd0b69f77a6ddc764207e97241 <9caad13b7cfe9ccb90cc405ac77335800e086595 || >=624322f1adc58acd0b69f77a6ddc764207e97241 <e08a3dcaca0505f861e344a387f37f94d95dbdc2 || >=624322f1adc58acd0b69f77a6ddc764207e97241 <a4d7fedcaaf33e60a01e53eafca9041ef966212f || >=624322f1adc58acd0b69f77a6ddc764207e97241 <4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b || >=624322f1adc58acd0b69f77a6ddc764207e97241 <129643893b79f8a3c6b72045f933fbab5ee424ca | 863b6e995665472f2af5be2436a874ab6a9e5ac6, d18d36395d973ef7372c8e6724970585f75b5c0b, 4415a692346a39fdb647cbd717eda510159aaf55, 9caad13b7cfe9ccb90cc405ac77335800e086595, e08a3dcaca0505f861e344a387f37f94d95dbdc2, a4d7fedcaaf33e60a01e53eafca9041ef966212f, 4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b, 129643893b79f8a3c6b72045f933fbab5ee424ca |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.