Use After Free The advisory has been revoked - it doesn't affect any version of package gnome-shell-extension-screenshot-window-sizer (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL8-GNOMESHELLEXTENSIONSCREENSHOTWINDOWSIZER-1919398
- published1 Sept 2021
- disclosed8 Jul 2021
Introduced: 8 Jul 2021
CVE-2021-21806 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:8.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gnome-shell-extension-screenshot-window-sizer package and not the gnome-shell-extension-screenshot-window-sizer package as distributed by RHEL.
An exploitable use-after-free vulnerability exists in WebKitGTK browser version 2.30.3 x64. A specially crafted HTML web page can cause a use-after-free condition, resulting in remote code execution. The victim needs to visit a malicious web site to trigger the vulnerability.