High7.4Red Hat & Ubuntu Linux
Full access via timing oracle attack in credential verification
CVE-2026-27856 Published Mar 27, 2026
CVE-2026-27856
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Full access via timing oracle attack in credential verification. Red Hat rates this important (CVSS 7.4). Weakness: CWE-208. Affected package(s): dovecot. Resolved in Red Hat advisory RHSA-2026:26564 — update the affected packages (`sudo dnf update`).
Affected versions
- dovecot-1:2.2.36-8.el7_9.1
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Fixed versions
- RHSA-2026:26564
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:26564 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
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