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SUSE qemu Important Heap Overflow Denial of Service Vuln 2026-2406-1

suse
Calendar Grey June 16, 2026
Dist Suse Esm H88
Important security update for SUSE fixing multiple vulnerabilities in qemu affecting enterprise systems.
An update that solves three vulnerabilities can now be installed.

Summary

## This update for qemu fixes the following issues: * CVE-2023-1544: pvrdma: out-of-bounds read in pvrdma_ring_next_elem_read() (bsc#1209554). * CVE-2025-11234: qemu-kvm: use-after-free in websocket handshake code can lead to denial of service (bsc#1250984). * CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak when processing specially crafted VMDK files (bsc#1258509). ## 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: * SUSE Linux Enterprise Server 12 SP5 LTSS zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-2406=1 * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security

Topics%20covered

Topics Covered

security advisory denial of service SuSE important heap overflow out-of-bounds

References

* bsc#1209554

* bsc#1250984

* bsc#1258509

Cross-

* CVE-2023-1544

* CVE-2025-11234

* CVE-2026-2243

CVSS scores:

* CVE-2023-1544 ( SUSE ): 7.9 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H

* CVE-2023-1544 ( NVD ): 6.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H

* CVE-2023-1544 ( NVD ): 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

* CVE-2025-11234 ( SUSE ): 8.7

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2025-11234 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2025-11234 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-2243 ( SUSE ): 4.8

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

* CVE-2026-2243 ( SUSE ): 4.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2406-1
Release Date: 2026-06-16T06:54:28Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service SuSE important heap overflow out-of-bounds

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