High [CVE-2026-20214] Denial of Service via crafted FSG file parsing
This high-severity Red Hat Linux advisory covers CVE-2026-20214.
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Summary
Denial of Service via crafted FSG file parsing. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-787.
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 1 month ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation checklist
- To reduce the attack surface, restrict network access to the ClamAV daemon (clamd) to trusted clients only. This can be achieved by configuring firewall rules to limit connections to the port clamd listens on. For example, using `firewalld`: `firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<TRUSTED_IP_ADDRESS>" port port="3310" protocol="tcp" accept'` `firewall-cmd --reload` Replace `<TRUSTED_IP_ADDRESS>` with the IP address or network range of trusted clients. This mitigation may impact legitimate scanning operations if not configured correctly. A restart of the `clamd` service may be required for changes to take full effect.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
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