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CVE-2021-28702

Description

PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, RMRR). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

Risk Information

Base Score
7.6
MODERATE
Vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS Score
Exploitation Probability
0.074

Associated Vulnerability

VulnerabilityOS Platform
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-debugsource-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-doc-html-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-32bit-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-32bit-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-debuginfo-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-4.12.4_16-3.55.1.x86_64.rpmLinux
SUSE-SU-2021:3852-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-debuginfo-4.12.4_16-3.55.1.x86_64.rpmLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234