Use After Free in Webkitgtk
CVE-2021-21806
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.
Vulnerability class: Use-After-Free
EPSS: 0.028 (85.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Webkitgtk — versions 2.30.3
- N/a Webkit — versions Webkit WebKitGTK 2.30.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)
- talos-cna@cisco.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21806?
- CVE-2021-21806 is a high-severity vulnerability in Webkitgtk, classified under Use After Free. CVSS score: 8.8/10. Published 2021-07-08.
- How severe is CVE-2021-21806?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-21806 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.