VDB
DEBIAN-CVE-2020-6821
DEBIAN-CVE-2020-6821
PUBLISHED
CVSS 7.5 HIGH
When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:11 | thunderbird | 0, 0, 0 |
| Debian:13 | thunderbird | 0, 0, 0 |
| Debian:11 | firefox-esr | 0, 0, 0 |
| Debian:13 | firefox-esr | 0, 0, 0 |
| Debian:12 | firefox-esr | 0, 0, 0 |
| Debian:14 | thunderbird | 0, 0, 0 |
| Debian:12 | thunderbird | 0, 0, 0 |
| Debian:14 | firefox-esr | 0, 0, 0 |
Timeline
- Apr 24, 2020 CVE Published
- Apr 28, 2026 CVE Updated