[UPDATE] [mittel] Linux Kernel (Bluetooth): Mehrere Schwachstellen ermöglichen Denial of Service

mediumCVE-2026-45834 CVE-2026-45835 CVE-2026-45836

Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel bezüglich der Bluetooth Komponente ausnutzen, um einen Denial of Service Angriff durchzuführen.

CSIRTS triage

vendor: Linux product: Linux Kernel (Bluetooth)Denial of service

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.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-09-07
Exploitation: Not in CISA KEV at last sync

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 EPSS-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 EPSS-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 EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-45834	coverage & exploitation status	NVD · CVE.org
CVE-2026-45835	coverage & exploitation status	NVD · CVE.org
CVE-2026-45836	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownMultiples vulnérabilités dans le noyau Linux d'Ubuntu (11 septembre 2026)cert-fr-avis
unknownexploitedUSN-8728-1: Linux kernel (GCP) vulnerabilitiesubuntu
unknownUSN-8668-1: Linux kernel (GCP) vulnerabilitiesubuntu
unknownUSN-8665-1: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu
unknownUSN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilitiesubuntu
unknownUSN-8663-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
unknownUSN-8620-4: Linux kernel (Intel IoTG) vulnerabilitiesubuntu
unknownUSN-8620-3: Linux kernel (Intel IoTG) vulnerabilitiesubuntu
unknownUSN-8620-2: Linux kernel (Azure FIPS) vulnerabilitiesubuntu
highUSN-8620-1: Linux kernel vulnerabilitiesubuntu
highUSN-8619-1: Linux kernel (HWE) vulnerabilitiesubuntu
highUSN-8595-3: Linux kernel (AWS) vulnerabilitiesubuntu

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-2026-89583: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: eir: Fix OOB re…nvd · 2026-09-11
unknownCVE-2026-89569: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: seriali…nvd · 2026-09-11
highCVE-2026-80914: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix use-af…nvd · 2026-09-09
unknownCVE-2026-80819: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: take rf…nvd · 2026-09-04
unknownCVE-2026-80764: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix …nvd · 2026-09-04
unknownCVE-2026-80763: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: vali…nvd · 2026-09-04