CVE-2026-53194: USB: serial: kl5kusb105: fix bulk-out buffer overflow

highCVSS 7.8CVE-2026-53194

CSIRTS triage

Other

What: There is a bulk-out buffer overflow vulnerability in the kl5kusb105 USB driver.
Who is affected: Deployments using the kl5kusb105 USB driver are affected.
Urgency: Remediation is urgent due to the high severity of the vulnerability.
Action: Apply the fix for the bulk-out buffer overflow.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53194

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-2026-531940.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53194	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownMultiple vulnerabilities in Microsoft Azure Linux (June 29, 2026)cert-fr-avis

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