OESA-2026-3318

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Source

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3318

Import Source

https://repo.openeuler.org/security/data/osv/OESA-2026-3318.json

JSON Data

https://api.osv.dev/v1/vulns/OESA-2026-3318

Upstream

CVE-2026-50538

Published

2026-08-13T13:57:19Z

Modified

2026-08-16T01:45:09.237404755Z

Severity

8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator

Summary

libvncserver security update

Details

libvncserver is a set of programs using the RFB (Remote Frame Buffer) protocol. They are designed to "export" a frame buffer via net: you set up a server and can connect to it via VNC viewers. If the server supports WebSockets (which LibVNCServer does), you can also connect using an in-browser VNC viewer like noVNC. It is already in wide use for administration, but it is not that easy to program a server yourself.

Security Fix(es):

An attacker-controlled heap out-of-bounds write vulnerability exists in the Tight decoder of libvncclient within libvncserver. An attacker can trigger a heap out-of-bounds write via crafted packets, potentially leading to denial of service or remote code execution.(CVE-2026-50538)

Database specific

{
    "severity": "High"
}

References

Affected packages

openEuler:24.03-LTS-SP1 / libvncserver

Package

Name: libvncserver
Purl: pkg:rpm/openEuler/libvncserver&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.9.13-6.oe2403sp1

Ecosystem specific

{
    "src": [
        "libvncserver-0.9.13-6.oe2403sp1.src.rpm"
    ],
    "x86_64": [
        "libvncserver-0.9.13-6.oe2403sp1.x86_64.rpm",
        "libvncserver-debuginfo-0.9.13-6.oe2403sp1.x86_64.rpm",
        "libvncserver-debugsource-0.9.13-6.oe2403sp1.x86_64.rpm",
        "libvncserver-devel-0.9.13-6.oe2403sp1.x86_64.rpm"
    ],
    "aarch64": [
        "libvncserver-0.9.13-6.oe2403sp1.aarch64.rpm",
        "libvncserver-debuginfo-0.9.13-6.oe2403sp1.aarch64.rpm",
        "libvncserver-debugsource-0.9.13-6.oe2403sp1.aarch64.rpm",
        "libvncserver-devel-0.9.13-6.oe2403sp1.aarch64.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-3318.json"