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CVE-2021-21779

HIGH
8.8
CVSS Score
Published: July 8, 2021 at 11:21 AM UTC
Updated: June 17, 2026 at 03:36 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraWebKitGTK

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Severity
HIGH8.8
Exploit prediction
EPSS 3%

Description

A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (5)

Mailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/07/23/1
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4945

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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