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CVE-2024-38543 is a NULL pointer dereference in the Linux kernel's HMM test infrastructure, in the device-mirror chunk-eviction path implemented by lib/test_hmm.c. The path allocates source and destination page-frame-number arrays for eviction. Under physical-memory exhaustion, allocation can fail; the previous code could subsequently dereference the resulting NULL src_pfns or dst_pfns pointer. The fix changes the allocation strategy to kvcalloc(), which does not require physically contiguous memory, and ensures the eviction path can obtain the required allocations while the device is being removed.
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A Linux kernel test_hmm component issue involving failure to allocate src_pfns and dst_pfns.
A Linux kernel test_hmm component vulnerability involving failure to handle src_pfns and dst_pfns allocation failures.
A Linux kernel vulnerability in lib/test_hmm.c involving failure handling for src_pfns and dst_pfns memory allocations.
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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.