[UPDATE] [medium] GNU libc: Vulnerability allows denial of service

mediumCVE-2026-4046

A remote, anonymous attacker can exploit a vulnerability in GNU libc to carry out a denial of service attack.

CSIRTS triage

vendor: GNU product: GNU libc Denial of service

What: A vulnerability allows denial of service.
Who is affected: A remote, anonymous attacker can exploit this vulnerability.
Urgency: Remediation is medium urgency as the severity is moderate.
Action: Patch GNU libc to the latest version to address the vulnerability.

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: 2026-07-06
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-2026-0918

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-2026-40460.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-4046	coverage & exploitation status	NVD · CVE.org

Recent advisories for GNU libc

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.

critical[UPDATE] [critical] GNU libc: Multiple vulnerabilitiescert-bund · 2026-07-10
medium[UPDATE] [medium] GNU libc: Multiple vulnerabilitiescert-bund · 2026-07-09