vulnerability
MFSA2023-49 Firefox: Security Vulnerabilities fixed in Firefox 120 (CVE-2023-6204)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:C/I:N/A:N) | Nov 21, 2023 | Nov 22, 2023 | Aug 11, 2025 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:C/I:N/A:N)
Published
Nov 21, 2023
Added
Nov 22, 2023
Modified
Aug 11, 2025
Description
On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Solution
mozilla-firefox-upgrade-120_0
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