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TI-2020-10621 Aliases CVE-2020-13543GHSA-mqwf-vg2c-5ch3

Use after free in Webkit

Priority MEDIUM 44CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 3 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A code execution vulnerability exists in the WebSocket functionality of Webkit WebKitGTK 2.30.0. A specially crafted web page can trigger a use-after-free vulnerability which can lead to remote code execution. An attacker can get a user to visit a webpage to trigger this vulnerability.

Why it matters now

EPSS 0.03487 89th percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 3 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—WebkitWebkit WebKitGTK 2.30.0—No fix listedCNA
  • Webkit Vendor— Affected Webkit WebKitGTK 2.30.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:webkitgtk:webkitgtk:2.30.0:*:*:*:*:*:*:*2.30.0VulnerableWebKitGTK
  • cpe:2.3:a:webkitgtk:webkitgtk:2.30.0:*:*:*:*:*:*:* Versions 2.30.0 Vulnerable ·WebKitGTK

Remediation

Red Hat 2 advisories

  • RHSA-2025:10364 Released 2025-07-07 · Red Hat rating Important
    webkitgtk4 security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4-2.48.3-2.el7_9, webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-jsc-2.48.3-2.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-doc-2.48.3-2.el7_9, webkitgtk4-jsc-devel-2.48.3-2.el7_9
  • RHSA-2021:1586 Released 2021-05-18 · Red Hat rating Moderate
    GNOME security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) glib2-doc-2.56.4-9.el8, glib2-static-2.56.4-9.el8
    • Red Hat Enterprise Linux AppStream (v. 8) gdm-1:3.28.3-39.el8, webkit2gtk3-2.30.4-1.el8, webkit2gtk3-devel-2.30.4-1.el8 +2
    • Red Hat Enterprise Linux BaseOS (v. 8) glib2-2.56.4-9.el8, glib2-devel-2.56.4-9.el8, glib2-fam-2.56.4-9.el8 +1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:1586
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:10364
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2025:10364
Not affected: 3 products
  • Red Hat CodeReady Linux Builder (v. 8)
  • Red Hat Enterprise Linux AppStream (v. 8)
  • Red Hat Enterprise Linux BaseOS (v. 8)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-13543
  2. 2026-10-03 Alias added: GHSA-mqwf-vg2c-5ch3

References

Exploit 1

Advisory 2

  • TI-2021-01572 Apple iOS and iPadOS: A remote attacker may be able to cause arbitrary code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22512 Memory corruption in Apple Safari KEVCVSS 3.1HIGH 8.8
  • TI-2025-05957 Improper input validation in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2022-14420 Out-of-bounds write in Apple Safari KEVCVSS 3.1HIGH 8.8
  • TI-2022-02117 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2021-11319 Integer overflow in Apple watchOS KEVCVSS 3.1HIGH 8.8
See all 67 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences