Answer in brief
CVE-2026-89669 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 11, 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.