Out-of-Bounds Read Vulnerability in QEMU's QXL Display Device Emulation
CVE-2022-4144

6.5MEDIUM

Key Information:

Vendor

Qemu
Status
Qemu (qxl Device)
Vendor
CVE Published:
29 November 2022

What is CVE-2022-4144?

An out-of-bounds read vulnerability exists in the QXL display device emulation in QEMU. This flaw arises from the qxl_phys2virt() function, which fails to properly validate the size of the structure that corresponds to a given guest physical address. This oversight allows the potential for reading beyond the intended buffer size and into adjacent memory pages. A malicious guest could exploit this vulnerability to cause the QEMU process on the host to crash, leading to a denial of service condition, thereby impacting system availability.

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Affected Version(s)

QEMU (QXL device) affects versions up to latest v7.1.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=2148506
https://lists.nongnu.org/archive/html/qemu-devel/2022-11/...
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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