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CVE-2026-59691

Last refreshed2026-11-05

Status: UPDATED  |  Advisory ID: CVE-2026-59691

Key Details

CVECVE-2026-59691
CVSS Score / Version
7.1 (High) / CVSS v3.1
Updated2026-11-04
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is none; integrity impact is low; availability impact is high.
Affected products
see table below
Classified as
CWE-787 (Out-of-bounds Write)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
Red HatRed Hat Enterprise Linux 10
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support
Red HatRed Hat Enterprise Linux 8
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red HatRed Hat Enterprise Linux 9
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support
Red HatRed Hat Enterprise Linux 6
SubsystemsOT Supporting Infrastructure
SectorsMultiple

What to Know

A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption. (NVD)

What to Do

Monitor Red Hat's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-59691
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-59691
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