vulnerability
MFSA2021-08 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.8 (CVE-2021-23978)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Feb 23, 2021 | Feb 24, 2021 | Feb 10, 2026 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Feb 23, 2021
Added
Feb 24, 2021
Modified
Feb 10, 2026
Description
Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Solution
mozilla-firefox-esr-upgrade-78_8
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