CVE-2026-89524

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89524

Key Details

CVE	CVE-2026-89524
CVSS Score / Version	8.1 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; 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: ath6kl: clamp assoc request/response lengths before subtracting IE offsets

ath6kl_cfg80211_connect_event() subtracts fixed IE offsets from

assoc_req_len (-= 4) and assoc_resp_len (-= 6), both u8, with no lower

bound. The aggregate check recently added to ath6kl_wmi_connect_event_rx()

bounds the declared lengths from above (their sum must fit the received

event), but an assoc request/response shorter than its fixed offset still

underflows here: the u8 wraps to ~250, and cfg80211_connect_result() /

cfg80211_roamed() then treat that wrapped value as the IE length and copy

that many bytes out of the small assoc_info buffer to user space via

nl80211, disclosing adjacent slab memory.

Clamp both lengths to their offsets before subtracting.

Found by 0sec (https://0sec.ai) using automated source analysis; the

missing lower bound is evident from source. Compile-tested. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89524
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89524

Source

Reference

NVD

CVE