synced 15 MIN AGO
01 Record

CVE-2023-3255

Qemu: vnc: infinite loop in inflate_buffer() leads to denial of service

MediumPUBLISHEDCNA: redhat
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
View raw JSON

02 Description

Qemu: vnc: infinite loop in inflate_buffer() leads to denial of service

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.89% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 79.3% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-09-13 16:12Z3 YR AGO
Last updated
2025-11-08 06:30Z11 MO AGO
Reserved
2023-06-14
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base
Data version
5.2
Document digest
66b16ea8b473e9ef7de85595479459c3fb926a811f2f66747a7856f90925411a

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat Enterprise Linux 8Not specified—
Red HatRed Hat Enterprise Linux 9Not specified—
Red HatRed Hat Enterprise Linux 6Not specified—
Red HatRed Hat Enterprise Linux 7Not specified—
Red HatRed Hat Enterprise Linux 8 Advanced VirtualizationNot specified—

06 References

07 Fixed in

AlmaLinux 9

  • qemu-guest-agent
    Fixed in 17:8.2.0-11.el9_4
  • qemu-img
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-audio-pa
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-block-blkio
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-block-curl
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-block-rbd
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-common
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-core
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-gpu
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-gpu-ccw
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-gpu-pci
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-vga
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-usb-host
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-usb-redirect
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-docs
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-tools
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-ui-egl-headless
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-ui-opengl
    Fixed in 17:8.2.0-11.el9_4
  • qemu-pr-helper
    Fixed in 17:8.2.0-11.el9_4

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • qemu-guest-agent
    Fixed in 17:8.2.0-11.el9_4
  • qemu-img
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-audio-pa
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-block-blkio
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-block-curl
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-block-rbd
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-common
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-core
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-gpu
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-gpu-ccw
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-gpu-pci
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-display-virtio-vga
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-usb-host
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-device-usb-redirect
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-docs
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-tools
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-ui-egl-headless
    Fixed in 17:8.2.0-11.el9_4
  • qemu-kvm-ui-opengl
    Fixed in 17:8.2.0-11.el9_4
  • qemu-pr-helper
    Fixed in 17:8.2.0-11.el9_4

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • qemu
    Fixed in 1:7.2+dfsg-7+deb12u2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • qemu
    Fixed in 1:8.0.4+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • qemu
    Fixed in 1:8.0.4+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • qemu
    Fixed in 1:6.2+dfsg-2ubuntu6.16

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.