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CVE-2018-3640 is a speculative-execution side-channel vulnerability in affected microprocessors, known as Rogue System Register Read (RSRE) or Spectre Variant 3a. On vulnerable CPUs, speculative execution can perform reads of privileged system register values and leave observable microarchitectural side effects. An attacker with local code execution as an unprivileged user can use side-channel analysis to infer system register contents or derived system parameters that should not be accessible at that privilege level. The issue is described as similar in class to Meltdown-style transient execution flaws, but it targets system registers rather than ordinary kernel memory. Available sources indicate the vulnerability is in CPU hardware behavior and mitigation primarily depends on processor microcode or firmware updates rather than kernel changes.
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What an attacker gets, and what they’ve been doing with it.
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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.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CPU speculative execution vulnerability added to Google's mitigation overview and addressed through product-specific mitigations and updates.
A speculative execution side-channel vulnerability known as Rogue System Register Read.
A speculative execution side-channel vulnerability referred to as Rogue System Register Read.
A Spectre-NG variant identified as Rogue System Register Read.
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.