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Vulnerabilities

Vulnerability · CVE-2026-59691

A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin.

Published Jul 9, 2026 · catalog updated Oct 1, 2026 · A heap buffer overflow

Check if you run it

No confirmed exploitation is on record for CVE-2026-59691. EPSS is 0.33%. Act only if a listed version of A heap buffer overflow is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A heap buffer overflow).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Advisory link
Affected products
Debian:12 gst-plugins-bad1.0 · Debian:13 gst-plugins-bad1.0 · Debian:14 gst-plugins-bad1.0

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 gst-plugins-bad1.01.22.0-4, 1.22.0-4+deb12u1, 1.22.0-4+deb12u2
  • Debian:13 gst-plugins-bad1.01.26.10-1, 1.26.10-2, 1.26.2-3
  • Debian:14 gst-plugins-bad1.00 → 1.28.5-1

How to fix CVE-2026-59691

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-59691. EPSS is 0.33%. Act only if a listed version of A heap buffer overflow is installed.

Which versions are affected?

Compare what you have installed with 1.22.0-4, 1.22.0-4+deb12u1, 1.22.0-4+deb12u2, 1.26.10-1, 1.26.10-2, 1.26.2-3, 0 → 1.28.5-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.33%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 9, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    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 (proces

  2. Oct 1, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    gst-plugins-bad1.0 fixed in 1.28.5-1

  3. Oct 1, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    gst-plugins-bad1.0 fixed in 1.28.5-1

  4. Oct 1, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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 (proces

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.