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CVE-2020-10757 is a Linux kernel memory-management vulnerability in mremap handling of DAX-backed huge-page mappings. In the page-table relocation logic, device-mapped DAX PMDs were not recognized as huge mappings alongside swap and transparent huge PMDs. When a huge DAX mapping backed by NVDIMM storage is remapped into anonymous memory, the kernel can incorrectly treat the physical huge data page as a page-table page. The remap can therefore complete while leaving a corrupted destination page table. The defect was present upstream after Linux 4.5-rc1 and was fixed by treating device-mapped PMDs as huge mappings during mremap processing.
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11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel flaw in which DAX huge pages are not considered during mremap operations.
A Linux kernel flaw in which DAX huge pages are not considered during mremap operations.
A Linux kernel flaw in which DAX hugepages are not considered during mremap operations.
A Linux kernel flaw in which DAX hugepages were not considered during mremap operations.
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.