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Critical Denial-of-Service Vulnerabilities in openSUSE qemu CVE-2025-11234

opensuse
Calendar Grey January 5, 2026
Dist Opensuse Esm H88
An important security advisory for openSUSE regarding qemu addresses vulnerabilities and recommends prompt updates.
An update that solves two vulnerabilities and has two security fixes can now be installed.

Description

This update for qemu fixes the following issues:

Security issues fixed:

* CVE-2025-12464: stack-based buffer overflow in the e1000 network device

operations can be exploited by a malicious guest user to crash the QEMU

process on the host (bsc#1253002).

* CVE-2025-11234: use-after-free in WebSocket handshake operations can be

exploited by a malicious client with network access to the VNC WebSocket

port to cause a denial-of-service (bsc#1250984).

Other updates and bugfixes:

* [openSUSE][RPM]: really fix *-virtio-gpu-pci dependency on ARM

(bsc#1254286).

* block/curl: fix curl internal handles handling (bsc#1252768).

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important QEMU OpenSUSE

Patch

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like

YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

* openSUSE Leap 15.6

zypper in -t patch SUSE-2026-22=1 openSUSE-SLE-15.6-2026-22=1

* SUSE Linux Enterprise Server 15 SP6 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-22=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-22=1

Package List

* openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64 i586)

* qemu-x86-8.2.10-150600.3.43.1

* qemu-vhost-user-gpu-debuginfo-8.2.10-150600.3.43.1

* qemu-audio-pa-debuginfo-8.2.10-150600.3.43.1

* qemu-hw-s390x-virtio-gpu-ccw-8.2.10-150600.3.43.1

* qemu-block-iscsi-debuginfo-8.2.10-150600.3.43.1

* qemu-accel-qtest-8.2.10-150600.3.43.1

* qemu-audio-spice-8.2.10-150600.3.43.1

* qemu-hw-usb-smartcard-8.2.10-150600.3.43.1

* qemu-ui-spice-app-debuginfo-8.2.10-150600.3.43.1

* qemu-ui-dbus-debuginfo-8.2.10-150600.3.43.1

* qemu-audio-spice-debuginfo-8.2.10-150600.3.43.1

* qemu-tools-debuginfo-8.2.10-150600.3.43.1

* qemu-hw-usb-redirect-8.2.10-150600.3.43.1

* qemu-linux-user-8.2.10-150600.3.43.1

* qemu-block-ssh-debuginfo-8.2.10-150600.3.43.1

* qemu-hw-display-virtio-gpu-8.2.10-150600.3.43.1

* qemu-ui-gtk-8.2.10-150600.3.43.1

* qemu-audio-alsa-8.2.10-150600.3.43.1

* qemu-hw-usb-redirect-debuginfo-8.2.10-150600.3.43.1

* qemu-audio-pa-8.2.10-150600.3.43.1

* qemu-guest-agent-debuginfo-8.2.10-150600.3.43.1

*...

Read the Full Advisory

References

* bsc#1250984

* bsc#1252768

* bsc#1253002

* bsc#1254286

## References:

* https://www.suse.com/security/cve/CVE-2025-11234.html

* https://www.suse.com/security/cve/CVE-2025-12464.html

* https://bugzilla.suse.com/show_bug.cgi?id=1250984

* https://bugzilla.suse.com/show_bug.cgi?id=1252768

* https://bugzilla.suse.com/show_bug.cgi?id=1253002

* https://bugzilla.suse.com/show_bug.cgi?id=1254286

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0022-1
Release Date: 2026-01-05T11:19:59Z
Affected Products: * openSUSE Leap 15.6 * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server 15 SP6 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP6

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow important QEMU OpenSUSE

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