[UPDATE] [high] Red Hat Enterprise Linux (urllib3): Multiple vulnerabilities allow denial of service
A remote, anonymous attacker can exploit multiple vulnerabilities in Red Hat Enterprise Linux to conduct a denial of service attack.
CSIRTS triage
- What
- A remote, anonymous attacker can exploit multiple vulnerabilities in Red Hat Enterprise Linux to conduct a denial of service attack.
- Who is affected
- Deployments of Red Hat Enterprise Linux are affected.
- Urgency
- Remediation is high urgency due to the potential for denial of service.
- Action
- Apply the latest security patches for Red Hat Enterprise Linux.
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-2026-0207
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-2025-664180.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all scored CVEs.
- Low exploitation riskCVE-2025-664710.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all scored CVEs.
- Moderate exploitation riskCVE-2026-214412.7% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 84% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-66418 | coverage & exploitation status | NVD · CVE.org |
| CVE-2025-66471 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-21441 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownMultiple vulnerabilities in IBM products (July 10, 2026)cert-fr-avis
Recent advisories for Red Hat Enterprise
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] Red Hat Enterprise Linux (perl-IO-Compress): Vulnerability allows executing arbitrary progra…cert-bund · 2026-07-10
- medium[UPDATE] [medium] Red Hat Enterprise Linux (crun): Vulnerability allows privilege escalationcert-bund · 2026-07-10
- high[UPDATE] [high] Red Hat Enterprise Linux (Lodash): Vulnerability allows denial of servicecert-bund · 2026-07-10
- medium[UPDATE] [medium] Red Hat Enterprise Linux (pyasn1): Vulnerability allows Denial of Servicecert-bund · 2026-07-10
- medium[UPDATE] [medium] Red Hat Enterprise Linux (LibRaw): Vulnerability allows code executioncert-bund · 2026-07-10
- high[UPDATE] [high] Red Hat Enterprise Linux (libsoup): Vulnerability allows information disclosurecert-bund · 2026-07-10
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