Reproduction of the Retbleed (CVE-2022-29900/29901) micro-architectural attack in gem5. RSB underflow, Flush+Reload side-channel leak, and a verified lfence mitigation.

What happened

A public source linked this CVE to an advisory or demonstration repository. Review the original reference before use.

Affected versions

Unknown product: See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

• Review the original advisory and validate affected versions.
• Apply vendor-provided updates or mitigations when available.