Unrated severityNVD Advisory· Published Sep 13, 2023· Updated Nov 8, 2025
Qemu: vnc: infinite loop in inflate_buffer() leads to denial of service
CVE-2023-3255
Description
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the inflate_buffer function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
38- Red Hat/Red Hat Enterprise Linux 8 Advanced Virtualizationv5cpe:/a:redhat:advanced_virtualization:8::el8
cpe:/a:redhat:enterprise_linux:8::appstream+ 3 more
- cpe:/a:redhat:enterprise_linux:8::appstreamrange: 8100020240314161907.e155f54d
- cpe:/a:redhat:enterprise_linux:9::appstreamrange: 17:8.2.0-11.el9_4
- cpe:/o:redhat:enterprise_linux:6
- cpe:/o:redhat:enterprise_linux:7
- osv-coords32 versionspkg:rpm/almalinux/qemu-guest-agentpkg:rpm/almalinux/qemu-imgpkg:rpm/almalinux/qemu-kvmpkg:rpm/almalinux/qemu-kvm-audio-papkg:rpm/almalinux/qemu-kvm-block-blkiopkg:rpm/almalinux/qemu-kvm-block-curlpkg:rpm/almalinux/qemu-kvm-block-rbdpkg:rpm/almalinux/qemu-kvm-commonpkg:rpm/almalinux/qemu-kvm-corepkg:rpm/almalinux/qemu-kvm-device-display-virtio-gpupkg:rpm/almalinux/qemu-kvm-device-display-virtio-gpu-ccwpkg:rpm/almalinux/qemu-kvm-device-display-virtio-gpu-pcipkg:rpm/almalinux/qemu-kvm-device-display-virtio-vgapkg:rpm/almalinux/qemu-kvm-device-usb-hostpkg:rpm/almalinux/qemu-kvm-device-usb-redirectpkg:rpm/almalinux/qemu-kvm-docspkg:rpm/almalinux/qemu-kvm-toolspkg:rpm/almalinux/qemu-kvm-ui-egl-headlesspkg:rpm/almalinux/qemu-kvm-ui-openglpkg:rpm/almalinux/qemu-pr-helperpkg:rpm/opensuse/qemu&distro=openSUSE%20Leap%2015.4pkg:rpm/opensuse/qemu&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/qemu&distro=openSUSE%20Leap%20Micro%205.3pkg:rpm/opensuse/qemu&distro=openSUSE%20Leap%20Micro%205.4pkg:rpm/opensuse/qemu&distro=openSUSE%20Tumbleweedpkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP4pkg:rpm/suse/qemu&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP5
< 17:8.2.0-11.el9_4+ 31 more
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 17:8.2.0-11.el9_4
- (no CPE)range: < 6.2.0-150400.37.20.1
- (no CPE)range: < 7.1.0-150500.49.6.1
- (no CPE)range: < 6.2.0-150400.37.20.1
- (no CPE)range: < 6.2.0-150400.37.20.1
- (no CPE)range: < 8.0.3-2.1
- (no CPE)range: < 6.2.0-150400.37.20.1
- (no CPE)range: < 6.2.0-150400.37.20.1
- (no CPE)range: < 7.1.0-150500.49.6.1
- (no CPE)range: < 6.2.0-150400.37.20.1
- (no CPE)range: < 7.1.0-150500.49.6.1
- (no CPE)range: < 6.2.0-150400.37.20.1
- (no CPE)range: < 7.1.0-150500.49.6.1
Patches
Vulnerability mechanics
References
4- access.redhat.com/errata/RHSA-2024:2135mitrevendor-advisoryx_refsource_REDHAT
- access.redhat.com/errata/RHSA-2024:2962mitrevendor-advisoryx_refsource_REDHAT
- access.redhat.com/security/cve/CVE-2023-3255mitrevdb-entryx_refsource_REDHAT
- bugzilla.redhat.com/show_bug.cgimitreissue-trackingx_refsource_REDHAT
News mentions
0No linked articles in our index yet.