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CVE-2024-40984 is a NULL pointer dereference in the Linux kernel ACPICA operation-region mapping path. A prior change limited mappings so that they did not cross a page boundary. When an ACPI operation-region access requested a length extending past the current page boundary, the mapping could be truncated to the bytes remaining in that page while subsequent read or write processing still accessed the originally requested full length. This mismatch can dereference a NULL mapping pointer. The fix reverts the truncating behavior and permits mapping the complete requested length across page and region boundaries, consistent with the ACPI specification.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel ACPICA issue addressed by reverting a change related to reporting multiple BAR mappings.
Linux kernel ACPICA flaw addressed by reverting logic associated with mapping multiple PCI Base Address Registers (BARs).
Linux kernel ACPICA vulnerability addressed by reverting handling related to mapping multiple BARs.
Linux kernel ACPICA flaw remediated by reverting a change related to mapping multiple BARs.
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.