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Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libvncserver | Aug 30, 2017 | Dec 31, 2016 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Dec 31, 2016 |
| Debian | — | Upgrade libvncserverUpgrade veyon | Jan 6, 2017 | Dec 31, 2016 |
| Freebsd | — | Upgrade libvncserver | Jan 10, 2017 | Jan 9, 2017 |
| Gentoo Linux | — | Upgrade net-libs/libvncserver. | Oct 30, 2017 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp1 | — | Upgrade libvncserver | Nov 30, 2017 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp2 | — | Upgrade libvncserver | Feb 22, 2021 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp3 | — | Upgrade libvncserver | Jan 20, 2021 | Dec 31, 2016 |
| Huawei Euleros 2_0_sp5 | — | Upgrade libvncserver | Feb 3, 2021 | Dec 31, 2016 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Nov 14, 2016 |
| Suse | — | Upgrade LibVNCServer-develUpgrade tigervncUpgrade libvncclient0Upgrade LibVNCServerUpgrade libvncserver0Upgrade libXvnc1Upgrade xorg-x11-Xvnc | Jan 12, 2017 | Dec 31, 2016 |
| Ubuntu | — | Upgrade italc-masterUpgrade libvncserver0Upgrade libvncclient1Upgrade italc-clientUpgrade libitalccoreUpgrade libvncserver1 | Jan 12, 2017 | Dec 31, 2016 |
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