CVE-2022-29901
Arbitrary Memory Disclosure through CPU Side-Channel Attacks (Retbleed)
- Published
- Jul 12, 2022
- Updated
- Aug 3, 2024
- Assigning CNA
- intel
- Evidence observed
- Sep 11, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:NLow · next 30 days
- Percentile
- 91.6%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.
Sources
1Reproduction of the Retbleed (CVE-2022-29900/29901) micro-architectural attack in gem5. RSB underflow, Flush+Reload side-channel leak, and a verified lfence mitigation.
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