vulnerability
MFSA2021-40 Firefox: Security Vulnerabilities fixed in Firefox ESR 91.1 (CVE-2021-38495)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Sep 7, 2021 | Sep 8, 2021 | Feb 10, 2026 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Sep 7, 2021
Added
Sep 8, 2021
Modified
Feb 10, 2026
Description
Mozilla developers reported memory safety bugs present in Thunderbird 78.13.0. 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 Thunderbird < 91.1 and Firefox ESR < 91.1.
Solution
mozilla-firefox-esr-upgrade-91_1
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