[UPDATE] [critical] GNU libc: Multiple vulnerabilities
A remote, anonymous attacker can exploit multiple vulnerabilities in GNU libc to manipulate files, cause a denial-of-service condition, or carry out other unspecified attacks.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited to manipulate files and cause denial-of-service conditions.
- Who is affected
- Deployments using GNU libc.
- Urgency
- Remediation is critical urgency due to the potential for exploitation.
- Action
- Update to the latest version of GNU libc.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1190
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-2026-54500.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all scored CVEs.
- Low exploitation riskCVE-2026-59280.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-5358 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-5450 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-5928 | 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.
- medium[UPDATE] [medium] GNU libc: Multiple vulnerabilitiescert-bund · 2026-07-09
- medium[UPDATE] [medium] GNU libc: Vulnerability allows denial of servicecert-bund · 2026-07-06
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- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-10