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[UPDATE] [high] Linux Kernel: Vulnerability allows Denial of Service

highCVE-2026-43490
A remote, anonymous attacker can exploit a vulnerability in Linux Kernel to conduct a Denial of Service attack or potentially disclose information.

CSIRTS triage

vendor: Linuxproduct: Linux KernelDenial of serviceInformation disclosure
What
A vulnerability allows a remote, anonymous attacker to conduct a Denial of Service attack or potentially disclose information.
Who is affected
All deployments using the affected Linux Kernel.
Urgency
Remediation is urgent due to the high severity and potential for information disclosure.
Action
Apply the patch for CVE-2026-43490.

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
2026-07-28
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-2026-1555

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-43490coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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.

More from CERT-Bund (BSI) Security Advisories