CVE-2026-59691

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:47179
https://access.redhat.com/errata/RHSA-2026:47180
https://access.redhat.com/errata/RHSA-2026:47731
https://access.redhat.com/errata/RHSA-2026:54658
https://access.redhat.com/errata/RHSA-2026:54659
https://access.redhat.com/errata/RHSA-2026:54660
https://access.redhat.com/errata/RHSA-2026:54664
https://access.redhat.com/errata/RHSA-2026:54665
https://access.redhat.com/errata/RHSA-2026:54752
https://access.redhat.com/errata/RHSA-2026:56658
https://access.redhat.com/errata/RHSA-2026:56772
https://access.redhat.com/errata/RHSA-2026:62532
https://access.redhat.com/security/cve/CVE-2026-59691
https://bugzilla.redhat.com/show_bug.cgi?id=2497343
https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5173

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-09 11:16

Updated : 2026-09-02 09:16

NVD link : CVE-2026-59691

Mitre link : CVE-2026-59691

CVE.ORG link : CVE-2026-59691

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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"source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-59691", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497343", "source": "secalert@redhat.com"}, {"url": "https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100", "source": "secalert@redhat.com"}, {"url": "https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5173", "source": "secalert@redhat.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-02T09:16:39.297", "sourceIdentifier": "secalert@redhat.com"}