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CVE-2024-42131 is an integer-overflow vulnerability in the Linux kernel's memory-management dirty-throttling logic. Calculations assume that dirty-memory limits expressed in PAGE_SIZE units fit within 32 bits, allowing associated multiplications to fit within 64 bits. Larger limits can overflow these calculations and potentially cause division by zero. The issue is triggerable only by root when dirty limits exceed 16 TB. Ratio-derived limits also depend on available memory, which can change through memory hotplug. The fix rejects excessively large byte-based limits and caps ratio-derived limits at UINT_MAX pages.
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A Linux kernel dirty-throttling vulnerability in which excessively large dirty-memory limits can cause integer overflows and possible division by zero, potentially disrupting system availability. Triggering requires root privileges and dirty limits exceeding 16 TB. The reference assigns a CVSS v3 base score of 4.4 (Medium). The fix rejects excessively large byte-based limits and caps ratio-derived page limits at UINT_MAX.
A Linux kernel memory-management dirty-throttling logic flaw that can cause integer overflows and possible division-by-zero conditions when a privileged local operator configures extremely large dirty limits (over 16 TB).
Linux kernel vulnerability covered by the security update.
A locally exploitable availability-impacting vulnerability requiring high privileges; the provided CVSS v3 vector indicates no confidentiality or integrity impact and high availability impact.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.