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CVE-2021-23997 PUBLISHED

Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 88.

EPSS 0.20% · 42.4th percentile

Risk Scores

EPSS Score
0.20%
42.4th percentile

Affected Products

VendorProductVersions
Ubuntu:20.04:LTSmozjs680, 68.5.0-1~fakesync, 68.5.0-2~fakesync
Ubuntu:16.04:LTSfirefox44.0.2+build1-0ubuntu1, 45.0+build2-0ubuntu1, 45.0.1+build1-0ubuntu1
Ubuntu:22.04:LTSmozjs780, 78.13.0-1, 78.15.0-2
Ubuntu:20.04:LTSmozjs520, 52.9.1-1ubuntu3, 52.9.1-1build1
Ubuntu:18.04:LTSmozjs5252.3.1-7fakesync1, 0, 52.3.1-0ubuntu3
Ubuntu:18.04:LTSmozjs380, 38.8.0~repack1-0ubuntu1, 38.8.0~repack1-0ubuntu3
Ubuntu:18.04:LTSfirefox66.0.2+build1-0ubuntu0.18.04.1, 66.0.3+build1-0ubuntu0.18.04.1, 66.0.4+build3-0ubuntu0.18.04.1
Ubuntu:20.04:LTSfirefox73.0.1+build1-0ubuntu1, 74.0+build1-0ubuntu1, 74.0+build2-0ubuntu1

Timeline

References

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