cve.bz

CVE-2021-23997

8.8 highEPSS 0.8%

High (8.8) in mozilla firefox. EPSS 0.8% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.8 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-31)
CWE
CWE-681
Published
Modified
Record from
the NVD, synced

Affected

References

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