Vulnerability in CVE-2026-52720 (CVSS 8.8)

Summary

vulnerability in CVE-2026-52720 (CVE-2026-52720). Successful exploitation can lead to full system takeover.

Original description

The description as published by the source.

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.

Source: NIST National Vulnerability Database NVD GitHub Advisory

AI summary

Written by an external AI model and may contain mistakes. Check the original description and references below before acting on it.

A vulnerability tracked as CVE-2026-52720 has been found in CVE-2026-52720.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-52720 CVE-2026-52720" on the vendor's site.

CVE-2026-52720 (CVE-2026-52720) — CWE-122 / CVSS v3 8.8
Attack vector: remote (network-reachable) / unauthenticated
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

GStreamerのlibrfbにヒープバッファオーバーフローの脆弱性があります。

📍 Affected scope

GStreamerのRFB/VNCクライアントlibrfb

🔥 Severity

悪意のあるVNCサーバーによるリモートコード実行やクラッシュを引き起こす可能性があります。

🔧 How to fix

個々の次元で範囲チェックを行うようにコードを修正します。

🛡️ Workaround

信頼できるVNCサーバーのみと接続するようにユーザーに指示します。

🔍 Detection

攻撃者が設定した悪意あるVNCサーバーに接続すると、クラッシュや異常な動作が発生した場合、脆弱性が存在する可能性があります。

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
Audit SBOM/dependencies for affected components.
```
依存マニフェストで影響コンポーネントを特定する。
7
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。

Fix status by distribution

Fixed packages published by each distribution for this CVE

Ubuntu UBUNTU-CVE-2026-52720 gst-plugins-bad1.0

Vulnerability in CVE-2026-52720 (CVE-2026-52720)

Summary

Original description

AI summary

Response actions

Fix status by distribution

References