CVE-2026-74325

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74325

Key Details

CVE	CVE-2026-74325
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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). (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74325
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74325

Source

Reference

NVD

CVE