Vulnerability Details : CVE-2021-21775

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

EPSS FAQ
0.36%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 73 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21775

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
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

  • The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
    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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