IRONSMITHINTEL
HIGHCVSS8.8
|
Actively Exploited
|CISA KEV|CVE-2019-8720|Auth: none — unauthenticated|Reboot: required|Manual only

WebKitGTK Memory Corruption Vulnerability

WebKitGTK contains a memory corruption vulnerability which can allow an attacker to perform remote code execution.

Published Mar 6, 2023 · Updated May 16, 2026
Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2022-06-13 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Buffer Overflow (CWE-119) vulnerability in WebKitGTK WebKitGTK. A vulnerability was found in WebKit. The flaw is triggered when processing maliciously crafted web content that may lead to arbitrary code execution. Improved memory handling addresses the multiple memory corruption issues. Exploitation requires remote network access, low attack complexity, no authentication required, and user interaction required.

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Phishing link

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Malicious file

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Server compromised

Am I affected?Quick check

Probably yes if any of these apply:

IT Security
Running webkitgtk: v < 2.26.0; wpe webkit: v < 2.26.0; codeready linux builder: 8.0; codeready linux builder eus: 8.4, 8.6; codeready linux builder for arm64 eus: 8.0, 8.4, 8.6; codeready linux builder for ibm z systems eus: 8.0, 8.4, 8.6; codeready linux builder for power little endian eus: 8.0, 8.4, 8.6; enterprise linux: 8.0; enterprise linux desktop: 7.0; enterprise linux eus: 8.4, 8.6; enterprise linux for arm64 eus: 8.6; enterprise linux for ibm z systems: 7.0, 8.0; enterprise linux for ibm z systems eus: 8.4, 8.6; enterprise linux for power big endian: 7.0; enterprise linux for power little endian: 7.0, 8.0; enterprise linux for power little endian eus: 8.4, 8.6; enterprise linux for scientific computing: 7.0; enterprise linux server: 7.0; enterprise linux server aus: 8.4, 8.6; enterprise linux server for power little endian update services for sap solutions: 8.4, 8.6; enterprise linux server tus: 8.4, 8.6; enterprise linux server update services for sap solutions: 8.4, 8.6; enterprise linux workstation: 7.0
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2022-05-23 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2022-06-13.

How to patch

Manual remediation steps

Apply the Vendor Patch

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.

CISA required action: Apply updates per vendor instructions.

References

    1
    Vendor advisory: https://webkitgtk.org/security/WSA-2019-0005.html
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2019-8720
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-8720
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