Answer in brief
CVE-2026-74409 records a Unknown severity vulnerability in wifi: rtw89: add bounds check on firmware mac_id in link lookup. 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 | >=144c6cd24b3556e6e7a14271cee57a42ebf97450 <ad445de67359f24088d4305c05fbd7e34c4e35e3 || >=144c6cd24b3556e6e7a14271cee57a42ebf97450 <920101305e7601a33b9e01019f4ca526af2526ae || >=144c6cd24b3556e6e7a14271cee57a42ebf97450 <6d88244bb129755acca696f9227200f4a2d106a6 | ad445de67359f24088d4305c05fbd7e34c4e35e3, 920101305e7601a33b9e01019f4ca526af2526ae, 6d88244bb129755acca696f9227200f4a2d106a6 |
| Linux/Linuxgeneric | 6.14 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: add bounds check on firmware mac_id in link lookup The mac_id field in RX descriptors is 8 bits wide (0-255), but assoc_link_on_macid[] has only RTW89_MAX_MAC_ID_NUM (128) entries. While the driver currently assigns mac_id values below 128, the descriptor value comes from firmware and is not validated before use as an array index. Add a defensive bounds check in rtw89_assoc_link_rcu_dereference() to guard against out-of-range firmware values.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-74409 records a Unknown severity vulnerability in wifi: rtw89: add bounds check on firmware mac_id in link lookup. 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 | >=144c6cd24b3556e6e7a14271cee57a42ebf97450 <ad445de67359f24088d4305c05fbd7e34c4e35e3 || >=144c6cd24b3556e6e7a14271cee57a42ebf97450 <920101305e7601a33b9e01019f4ca526af2526ae || >=144c6cd24b3556e6e7a14271cee57a42ebf97450 <6d88244bb129755acca696f9227200f4a2d106a6 | ad445de67359f24088d4305c05fbd7e34c4e35e3, 920101305e7601a33b9e01019f4ca526af2526ae, 6d88244bb129755acca696f9227200f4a2d106a6 |
| Linux/Linuxgeneric | 6.14 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: add bounds check on firmware mac_id in link lookup The mac_id field in RX descriptors is 8 bits wide (0-255), but assoc_link_on_macid[] has only RTW89_MAX_MAC_ID_NUM (128) entries. While the driver currently assigns mac_id values below 128, the descriptor value comes from firmware and is not validated before use as an array index. Add a defensive bounds check in rtw89_assoc_link_rcu_dereference() to guard against out-of-range firmware values.
Quoted source text, attributed separately from HOL analysis.