CVE-2016-9942

Name: CVE-2016-9942
Creator: NVD / NIST
Published: 2016-12-31T18:59:00.18+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.72%

Last modified Jun 17, 2026

CVE-2016-9942 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.72% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

3.72%

88.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Libvncserver Project	Libvncserver	0.9.10

References

Timeline

Published: Dec 31, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9942?

How severe is CVE-2016-9942?

Severity scoring for CVE-2016-9942 is pending analysis. The EPSS model estimates a 3.72% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9942?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-9942?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST