CVE-2026-68198: wifi: ath6kl: fix use-after-free in aggr_reset_state()

CSIRTS triage

What

The ath6kl WiFi driver contains a use-after-free vulnerability in the aggr_reset_state function.

Who is affected

Systems using Qualcomm Atheros ath6kl WiFi driver.

Urgency

Critical; CVSS 9.8 indicates severe memory safety risk requiring immediate remediation.

Action

Update ath6kl driver to patched version addressing use-after-free condition.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

critical — CVSS 9.8

Published

2026-08-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68198

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-681980.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• unknownDSA-6466-1 linux - security updatedebian
• highCVE-2026-68198: In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix use-afte…nvd

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