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CVE-2023-6240 is the Marvin vulnerability in Linux kernel RSA decryption operations. Observable timing differences during private-key RSA processing can create a side channel for adaptive chosen-ciphertext attacks against services that expose affected RSA private-key operations. The issue is a timing-side-channel variant of Bleichenbacher-style attacks against RSA PKCS#1 v1.5 encryption.
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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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A kernel-side Marvin side-channel vulnerability that can leak information during RSA decryption operations.
A Linux kernel side-channel information-leakage vulnerability affecting RSA decryption operations.
Linux kernel RSA-decryption side-channel information-leakage vulnerability.
Linux kernel RSA-decryption side-channel information-leakage vulnerability.
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.