Medium [CVE-2026-18103] Persistent denial of service due to buffer overflow via OMAPI
This medium-severity Red Hat Linux advisory covers CVE-2026-18103.
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Summary
Persistent denial of service due to buffer overflow via OMAPI. Red Hat rates this low (CVSS 4.9).
Weakness: CWE-120.
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 2 months 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 2 months ago·verify at source
Mitigation checklist
- To mitigate this issue, secure OMAPI access by configuring TSIG key authentication to prevent unauthorized connections to the OMAPI port (7911). If the `dhcpd` service has already crashed due to this flaw, manually remove the problematic InfiniBand lease entry from `/var/lib/dhcpd/dhcpd.leases` and then restart the `dhcpd` service. Restarting the `dhcpd` service may temporarily interrupt DHCP services for clients.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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