Answer in brief
CVE-2025-21659 records a Unknown severity vulnerability in netdev: prevent accessing NAPI instances from another namespace. 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 | >=27f91aaf49b3a50e5a02ad5fa27b7c453d029a72 <b683ba0df11ff563cc237eb1b74d6adfa77226bf || >=27f91aaf49b3a50e5a02ad5fa27b7c453d029a72 <d1cacd74776895f6435941f86a1130e58f6dd226 | b683ba0df11ff563cc237eb1b74d6adfa77226bf, d1cacd74776895f6435941f86a1130e58f6dd226 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Jan 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: netdev: prevent accessing NAPI instances from another namespace The NAPI IDs were not fully exposed to user space prior to the netlink API, so they were never namespaced. The netlink API must ensure that at the very least NAPI instance belongs to the same netns as the owner of the genl sock. napi_by_id() can become static now, but it needs to move because of dev_get_by_napi_id().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-21659 records a Unknown severity vulnerability in netdev: prevent accessing NAPI instances from another namespace. 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 | >=27f91aaf49b3a50e5a02ad5fa27b7c453d029a72 <b683ba0df11ff563cc237eb1b74d6adfa77226bf || >=27f91aaf49b3a50e5a02ad5fa27b7c453d029a72 <d1cacd74776895f6435941f86a1130e58f6dd226 | b683ba0df11ff563cc237eb1b74d6adfa77226bf, d1cacd74776895f6435941f86a1130e58f6dd226 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Jan 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: netdev: prevent accessing NAPI instances from another namespace The NAPI IDs were not fully exposed to user space prior to the netlink API, so they were never namespaced. The netlink API must ensure that at the very least NAPI instance belongs to the same netns as the owner of the genl sock. napi_by_id() can become static now, but it needs to move because of dev_get_by_napi_id().
Quoted source text, attributed separately from HOL analysis.