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CVE-2024-35814 is an alignment-calculation flaw in the Linux kernel Software I/O Translation Lookaside Buffer (SWIOTLB) allocator. A regression in SWIOTLB slot-alignment handling can leave the allocation search index unaligned after a preceding buffer allocation. Subsequent coherent DMA allocations may then be returned at a non-page-aligned slot address. swiotlb_alloc() assumes page alignment when converting the allocation to a struct page, causing the first 2 KiB slot of a 4 KiB page to be allocated more than once. The corrected implementation evaluates allocation alignment independently from device-specific alignment requirements, uses the greater requirement as the slot-search stride, and preserves page alignment for allocations larger than a page. The fix also prevents excessive alignment requirements from causing SWIOTLB allocation failures.
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No public exploit code observed for this vulnerability.
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2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel vulnerability referenced by the advisory; no specific technical description is provided in the content.
A low-severity Linux kernel SWIOTLB flaw in alignment handling that could result in double allocation of slots.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.