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Vulnerabilities

Vulnerability · CVE-2026-52720

A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client).

Published Jun 15, 2026 · catalog updated Oct 16, 2026 · A heap buffer overflow

Check if you run it

No confirmed exploitation is on record for CVE-2026-52720. EPSS is 0.64%. 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
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.64%
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 librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash.

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-bad1.00 → 1.22.0-4+deb12u8
  • Debian:13 gst-plugins-bad1.00 → 1.26.2-3+deb13u3
  • Debian:14 gst-plugins-bad1.00 → 1.28.5-1

How to fix CVE-2026-52720

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-2026-52720. EPSS is 0.64%. Act only if a listed version of A heap buffer overflow is installed.

Which versions are affected?

Compare what you have installed with 0 → 1.22.0-4+deb12u8, 0 → 1.26.2-3+deb13u3, 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 0.64%. 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. Jun 15, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that c

  2. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    gst-plugins-bad1.0 fixed in 1.22.0-4+deb12u8; gst-plugins-bad1.0 fixed in 1.26.2-3+deb13u3; gst-plugins-bad1.0 fixed in 1.28.5-1

  3. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    gst-plugins-bad1.0 fixed in 1.22.0-4+deb12u8

  4. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    gst-plugins-bad1.0 fixed in 1.26.2-3+deb13u3

  5. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

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

  6. Oct 16, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that c

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.