Answer in brief
CVE-2026-74325 records a Unknown severity vulnerability in wifi: mt76: use kfree_rcu for offchannel link in mt76_put_vif_phy_link. 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 | >=a8f424c1287cc79a06c21816658feea87dfcb83f <c7a83899203ed36696a2d35ddd03c0f522874a63 || >=a8f424c1287cc79a06c21816658feea87dfcb83f <50e700ac0edce72dee5c3a9755865d9423696ac7 || >=a8f424c1287cc79a06c21816658feea87dfcb83f <7fae097aa9a56c30febf539d72ef3773165d3aa3 | c7a83899203ed36696a2d35ddd03c0f522874a63, 50e700ac0edce72dee5c3a9755865d9423696ac7, 7fae097aa9a56c30febf539d72ef3773165d3aa3 |
| 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: mt76: use kfree_rcu for offchannel link in mt76_put_vif_phy_link mt76_put_vif_phy_link() frees the offchannel mlink with plain kfree() after rcu_assign_pointer(NULL). However, rcu_assign_pointer only prevents future RCU readers from obtaining the pointer -- it does not wait for existing readers that already hold it via rcu_dereference. The TX datapath (e.g. mt7996_mac_write_txwi) dereferences mlink->wcid and mlink->idx under rcu_read_lock. If a TX softirq obtained the pointer via rcu_dereference just before the NULL assignment, it will dereference freed memory after the kfree. struct mt76_vif_link already contains an rcu_head field that is unused at this free site -- a developer oversight, since the adjacent kfree_rcu_mightsleep call for rx_sc in the same function shows the pattern was understood. Replace kfree(mlink) with kfree_rcu(mlink, rcu_head).
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-74325 records a Unknown severity vulnerability in wifi: mt76: use kfree_rcu for offchannel link in mt76_put_vif_phy_link. 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 | >=a8f424c1287cc79a06c21816658feea87dfcb83f <c7a83899203ed36696a2d35ddd03c0f522874a63 || >=a8f424c1287cc79a06c21816658feea87dfcb83f <50e700ac0edce72dee5c3a9755865d9423696ac7 || >=a8f424c1287cc79a06c21816658feea87dfcb83f <7fae097aa9a56c30febf539d72ef3773165d3aa3 | c7a83899203ed36696a2d35ddd03c0f522874a63, 50e700ac0edce72dee5c3a9755865d9423696ac7, 7fae097aa9a56c30febf539d72ef3773165d3aa3 |
| 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: mt76: use kfree_rcu for offchannel link in mt76_put_vif_phy_link mt76_put_vif_phy_link() frees the offchannel mlink with plain kfree() after rcu_assign_pointer(NULL). However, rcu_assign_pointer only prevents future RCU readers from obtaining the pointer -- it does not wait for existing readers that already hold it via rcu_dereference. The TX datapath (e.g. mt7996_mac_write_txwi) dereferences mlink->wcid and mlink->idx under rcu_read_lock. If a TX softirq obtained the pointer via rcu_dereference just before the NULL assignment, it will dereference freed memory after the kfree. struct mt76_vif_link already contains an rcu_head field that is unused at this free site -- a developer oversight, since the adjacent kfree_rcu_mightsleep call for rx_sc in the same function shows the pattern was understood. Replace kfree(mlink) with kfree_rcu(mlink, rcu_head).
Quoted source text, attributed separately from HOL analysis.