A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. In order to trigger the vulnerability, a victim must be tricked into visiting a malicious webpage.
Published 2021-07-07 22:15:08
Updated 2022-08-24 19:43:17
Source Talos
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Exploit prediction scoring system (EPSS) score for CVE-2021-21775

Probability of exploitation activity in the next 30 days: 0.18%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 55 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-21775

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
6.0
MEDIUM AV:N/AC:M/Au:S/C:P/I:P/A:P
6.8
6.4
NIST
6.8
MEDIUM CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
2.1
4.7
Talos
8.0
HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
2.1
5.9
NIST

CWE ids for CVE-2021-21775

  • Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
    Assigned by:
    • nvd@nist.gov (Primary)
    • talos-cna@cisco.com (Secondary)

References for CVE-2021-21775

Products affected by CVE-2021-21775

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