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prionPRIOn knowledge basePRION:CVE-2021-29976
HistoryAug 05, 2021 - 8:15 p.m.

Memory corruption

2021-08-0520:15:00
PRIOn knowledge base
www.prio-n.com
10

8.9 High

AI Score

Confidence

High

0.004 Low

EPSS

Percentile

74.6%

Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 < 78.12, Firefox ESR < 78.12, and Firefox < 90.