Multiple vulnerabilities in Opera

Description

Multiple vulnerabilities were found in Opera. Malicious users can exploit these vulnerabilities to bypass security restrictions, cause denial of service, spoof user interface.

Below is a complete list of vulnerabilities:

1. A data validation vulnerability in V8 can be exploited to bypass security restrictions.
2. A policy enforcement vulnerability in extensions component can be exploited to bypass security restrictions.
3. A use after free vulnerability in Dev Tools can be exploited to cause denial of service or execute arbitrary code.
4. A type confusion vulnerability in V8 can be exploited to cause denial of service.
5. A heap buffer overflow vulnerability in ANGLE can be exploited to cause denial of service.
6. A security UI vulnerability in downloads component can be exploited to spoof user interface.

Original advisories

• Changelog for Opera 76

• Stable Channel Update for Desktop

Related products

• Opera

CVE list

• CVE-2021-21227
  critical
• CVE-2021-21228
  warning
• CVE-2021-21232
  critical
• CVE-2021-21230
  critical
• CVE-2021-21233
  critical
• CVE-2021-21231
  critical
• CVE-2021-21229
  high

Read more

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