CVE-2022-26361

Description

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

How to fix CVE-2022-26361

To remediate CVE-2022-26361, upgrade the affected package to a fixed version below.

• —upgrade to 4.13.4-r3 or later
• —upgrade to 4.14.4+74-gd7b22226b5-1 or later

Is CVE-2022-26361 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 4.13.4-r3
• from 0, < 4.14.4+74-gd7b22226b5-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-26361
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-26361