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CVE-2016-9603

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could…

Medium5.5EPSS 4.4%
Published
Updated
Reserved
Assigned by
redhat

Description

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

Scores

CVSS scores of CVE-2016-9603, by who scored it
Scored byCVSSScoreVector
redhatCNA (assigner)3.0Medium5.5CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
NVDNVD · Modified3.0Critical9.9CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS (exploitation in 30 days)
4.4% · top 8.6% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

Affected products

  • QEMU · Qemu:

    • affected 2.9

References (18)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .