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CVE-2026-64219 affects the Linux kernel AMD display driver's dc_process_dmub_aux_transfer_async() function. The function copies payload->length bytes into a 16-byte stack buffer using memcpy, relying on an ASSERT() that is ineffective in release builds. A payload length exceeding 16 bytes therefore causes a stack buffer overflow. The function also uses link_index to access dc->links[] without checking it against dc->link_count, creating a potential out-of-bounds access. These validation failures can cause kernel memory corruption and potentially denial of service or kernel-context code execution.
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Insufficient validation of payload length and link_index in dc_process_dmub_aux_transfer_async within the Linux kernel AMD display driver.
A vulnerability covered by the Miracle Linux kernel package update. Individual technical details and exploit availability are not specified.
Linux kernel vulnerability fixed by USN-8802-1.
Linux kernel vulnerability addressed by Ubuntu USN-8761-1.
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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.