CVE record
CVE-2020-6820
Mozilla Firefox And Thunderbird Use-After-Free Vulnerability
Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.
CVE evidence
Known exploitation
Listed in CISA KEV
Absence from the fetched catalog does not establish that exploitation has not occurred.
Severity
high
CVSS 8.1 · CVSS_V3
Affected packages
0
Supported package records returned by OSV. Vendor and product names are not used to infer matches.
CISA Known Exploited Vulnerabilities
Catalog record
- Vendor / project
- Mozilla
- Product
- Firefox and Thunderbird
- Date added
- Nov 3, 2021
- CISA federal remediation due date
- May 3, 2022
- Required action
- Apply updates per vendor instructions.
- Known ransomware campaign use
- Unknown
- CWE
- CWE-362
OSV package mapping
Affected open-source packages
OSV did not return a package mapping in the five supported ecosystems. RequestGuard does not infer package names from the CISA vendor or product fields.