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CVE-2022-29901, known as Retbleed, is a speculative-execution vulnerability in certain Intel sixth- through eighth-generation processors, including Skylake through Rocket Lake systems exhibiting Return Stack Buffer Alternate Behavior. When the Return Stack Buffer underflows, a return instruction can be speculatively redirected through Branch Target Buffer prediction. Non-transparent sharing of branch-predictor targets between execution contexts permits a local low-privileged attacker to influence speculative control flow and bypass kernel retpoline protections. The resulting transient execution can expose data through microarchitectural side channels.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
19 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Intel RetBleed speculative-execution vulnerability involving return instructions.
Intel RetBleed speculative-execution vulnerability involving return instructions.
Intel RetBleed speculative-execution vulnerability involving return instructions and arbitrary speculative code execution.
An Intel CPU RetBleed speculative-execution vulnerability involving return instructions that can result in arbitrary speculative code execution.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.