High [CVE-2026-55556] Denial of Service via heap buffer overflow in imhttp module
This high-severity Red Hat Linux advisory covers CVE-2026-55556.
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Summary
Denial of Service via heap buffer overflow in imhttp module. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-131.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
- 8.2604.0
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Mitigation checklist
- To mitigate this issue, ensure that the `imhttp` module is not loaded or configured with Basic Authentication if not strictly required. If the `imhttp` module is in use, review its configuration to remove Basic Authentication settings. After making configuration changes, the rsyslog service must be restarted for the changes to take effect.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
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