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CVE-2024-42131 is an integer-overflow vulnerability in the Linux kernel memory-management dirty-throttling logic. The affected calculations assume dirty-memory limits expressed in PAGE_SIZE units fit in 32 bits, allowing subsequent arithmetic to fit in 64 bits. Configuring excessively large dirty limits violates those assumptions, causing arithmetic overflows and potentially division-by-zero conditions. The upstream correction rejects excessively large byte-based dirty limits and caps ratio-derived dirty page limits at UINT_MAX.
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No public exploit code observed for this vulnerability.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel memory-management vulnerability involving overflows in dirty throttling logic.
Linux kernel memory-management integer-overflow flaw in dirty-throttling logic.
Linux kernel memory-management integer-overflow issue in dirty-throttling logic.
A Linux kernel memory-management dirty-throttling flaw in which excessively large dirty-page limits can overflow arithmetic, potentially leading to divide-by-zero conditions. It is locally/root triggerable when an operator configures dirty limits above 16 TB.
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.