Critical [CVE-2026-33210] Denial of Service or Information Disclosure via format string injection
This critical-severity Red Hat Linux advisory covers CVE-2026-33210 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Hardened Images.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published
Summary
Denial of Service or Information Disclosure via format string injection. Red Hat rates this important (CVSS 9.1).
Weakness: CWE-134. Affected package(s): ruby4.0, ruby:4.0.
Resolved in Red Hat advisory RHSA-2026:20606 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Hardened Images.
Is CVE-2026-33210 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-33210 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-33210?
Upgrade to a fixed release named by Red Hat:
- RHSA-2026:20606
Confirm against the vendor advisory before you patch.
- ruby4.0-0:4.0.3-34.el10_2
- ruby:4.0-9080020260513131334.9
Official advisory · high-confidence parse· fetched 4 months ago·verify at source
- RHSA-2026:20606
Official advisory · high-confidence parse· fetched 4 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:20606 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 4 months ago·verify at source
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