CVE-2018-5407

mediumCVSS 4.7covered by 1 sourcefirst seen 2026-08-06

CSIRTS triage

What: Simultaneous Multi-threading in processors enables local users to exploit timing-attack vulnerabilities via side-channel port contention.
Who is affected: Systems with SMT-enabled processors running cryptographic software vulnerable to timing attacks are affected.
Urgency: Medium severity (CVSS 4.7); requires local access but affects widely-deployed crypto libraries.
Action: Disable SMT on affected systems or apply timing-attack mitigations in affected cryptographic libraries.

AI-assisted analysis generated from the source advisory — verify against the original.

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Moderate exploitation risk3.4% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 88% of all EPSS-scored CVEs.

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