[UPDATE] [high] Linux Kernel: Multiple vulnerabilities allow denial of service

highCVE-2025-68338 CVE-2025-68339 CVE-2025-68340 CVE-2025-68341 CVE-2025-68342 CVE-2025-68343

An attacker can exploit multiple vulnerabilities in the Linux Kernel to conduct a denial of service attack or perform other unspecified attacks.

CSIRTS triage

vendor: Linux product: Linux Kernel Denial of service

What: Multiple vulnerabilities allow denial of service attacks.
Who is affected: Deployments of the Linux Kernel.
Urgency: Remediation is urgent due to the high severity of the vulnerabilities.
Action: Apply the latest patches 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: high
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-2025-2915

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-2025-683380.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.
Low exploitation riskCVE-2025-683390.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all scored CVEs.
Low exploitation riskCVE-2025-683400.12% 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-2025-683410.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.
Low exploitation riskCVE-2025-683420.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.
Low exploitation riskCVE-2025-683430.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-68338	coverage & exploitation status	NVD · CVE.org
CVE-2025-68339	coverage & exploitation status	NVD · CVE.org
CVE-2025-68340	coverage & exploitation status	NVD · CVE.org
CVE-2025-68341	coverage & exploitation status	NVD · CVE.org
CVE-2025-68342	coverage & exploitation status	NVD · CVE.org
CVE-2025-68343	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownDebian Linux Kernel Multiple Vulnerabilitieshkcert

Recent advisories for Linux Kernel

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.

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