CVE-2024-31145

NameCVE-2024-31145
DescriptionCertain 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. In the logic establishing these mappings, error handling was flawed, resulting in such mappings to potentially remain in place when they should have been removed again. Respective guests would then gain access to memory regions which they aren't supposed to have access to.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xen (PTS)jessie, jessie (lts)4.4.4lts5-0+deb8u1vulnerable
stretch (security), stretch (lts), stretch4.8.5.final+shim4.10.4-1+deb9u12vulnerable
buster (security), buster, buster (lts)4.11.4+107-gef32c7afa2-1vulnerable
bullseye4.14.6-1vulnerable
bullseye (security)4.14.5+94-ge49571868d-1vulnerable
bookworm4.17.3+10-g091466ba55-1~deb12u1vulnerable
sid, trixie4.17.3+36-g54dacb5c02-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xensourceexperimental4.19.0+14-g0918434e0f-1~exp1
xensourcejessie(unfixed)end-of-life
xensourcestretch(unfixed)end-of-life
xensourcebuster(unfixed)end-of-life
xensourcebullseye(unfixed)end-of-life
xensource(unstable)(unfixed)

Notes

[bullseye] - xen <end-of-life> (EOLed in Bullseye)
https://xenbits.xen.org/xsa/advisory-460.html

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