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CVE-2022-0854 is an information-disclosure vulnerability in the Linux kernel Software I/O Translation Lookaside Buffer (swiotlb) DMA subsystem. swiotlb handling of DMA_FROM_DEVICE can copy bounce-buffer contents back to user space without reliably accounting for the amount of data actually written by the device. Consequently, stale kernel memory can be returned when a DMA request completes without overwriting the full requested buffer. A documented triggering case uses SCSI SG_IO requests that nominally request data from a device but perform no actual data transfer, such as TEST UNIT READY. The correct upstream remediation reworks the initial swiotlb fix to ensure the original buffer is copied into the bounce buffer as needed to prevent disclosure of stale contents.
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14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel swiotlb information disclosure vulnerability where DMA_FROM_DEVICE bounce-buffer handling can leak stale kernel memory to user space.
Linux kernel swiotlb information-disclosure flaw involving DMA_FROM_DEVICE.
Linux kernel SWIOTLB information-disclosure vulnerability involving DMA_FROM_DEVICE.
Linux kernel SWIOTLB information-disclosure vulnerability affecting DMA_FROM_DEVICE handling.
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.