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CVE-2021-4122 is a logic flaw in cryptsetup’s handling of LUKS metadata during device recovery. A specially crafted LUKS header can cause cryptsetup, as part of an automatic recovery process, to disable the encryption layer for the device. The issue does not require breaking the underlying cryptography; instead, it abuses trusted processing of attacker-modified on-disk metadata so that recovery proceeds in a way that silently decrypts the medium or leaves it operating without encryption. The provided context specifically states that this can occur during recovery of the device and can result in the whole disk being silently decrypted.
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What an attacker gets, and what they’ve been doing with it.
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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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.