Answer in brief
CVE-2025-21808 records a Unknown severity vulnerability in net: xdp: Disallow attaching device-bound programs in generic mode. 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 | >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <b1bc4a35a04cbeb85b6ef5911ec015baa424989f || >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <557707906dd3e34b8a8c265f664d19f95799937e || >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1 || >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <3595599fa8360bb3c7afa7ee50c810b4a64106ea | b1bc4a35a04cbeb85b6ef5911ec015baa424989f, 557707906dd3e34b8a8c265f664d19f95799937e, 5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1, 3595599fa8360bb3c7afa7ee50c810b4a64106ea |
| Linux/Linuxgeneric | 6.3 | Not reported |
Published upstream
Feb 27, 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: net: xdp: Disallow attaching device-bound programs in generic mode Device-bound programs are used to support RX metadata kfuncs. These kfuncs are driver-specific and rely on the driver context to read the metadata. This means they can't work in generic XDP mode. However, there is no check to disallow such programs from being attached in generic mode, in which case the metadata kfuncs will be called in an invalid context, leading to crashes. Fix this by adding a check to disallow attaching device-bound programs in generic mode.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-21808 records a Unknown severity vulnerability in net: xdp: Disallow attaching device-bound programs in generic mode. 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 | >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <b1bc4a35a04cbeb85b6ef5911ec015baa424989f || >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <557707906dd3e34b8a8c265f664d19f95799937e || >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1 || >=2b3486bc2d237ec345b3942b7be5deabf8c8fed1 <3595599fa8360bb3c7afa7ee50c810b4a64106ea | b1bc4a35a04cbeb85b6ef5911ec015baa424989f, 557707906dd3e34b8a8c265f664d19f95799937e, 5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1, 3595599fa8360bb3c7afa7ee50c810b4a64106ea |
| Linux/Linuxgeneric | 6.3 | Not reported |
Published upstream
Feb 27, 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: net: xdp: Disallow attaching device-bound programs in generic mode Device-bound programs are used to support RX metadata kfuncs. These kfuncs are driver-specific and rely on the driver context to read the metadata. This means they can't work in generic XDP mode. However, there is no check to disallow such programs from being attached in generic mode, in which case the metadata kfuncs will be called in an invalid context, leading to crashes. Fix this by adding a check to disallow attaching device-bound programs in generic mode.
Quoted source text, attributed separately from HOL analysis.