[UPDATE] [medium] Linux Kernel (Bluetooth): Multiple vulnerabilities allow Denial of Service

CSIRTS triage

What

Multiple vulnerabilities allow denial of service.

Who is affected

A local attacker can exploit these vulnerabilities.

Urgency

Remediation is medium urgency as the severity is moderate.

Action

Update the Bluetooth component of the Linux Kernel to the latest version to mitigate the vulnerabilities.

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

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

medium

Published

2026-07-06

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1684

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-2026-458340.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
• Low exploitation riskCVE-2026-458350.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
• Low exploitation riskCVE-2026-458360.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

Recent advisories for Linux Kernel (Bluetooth)

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• unknownCVE-2026-53358: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: use chan…nvd · 2026-07-02
• unknownCVE-2026-53357: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix UAF in l2ca…nvd · 2026-07-02

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