CVE-2021-29972
CVSS v3
8.8
HIGH
EPSS Score
1.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library. Updating the library resolved the issue, and may have remediated other, unknown security vulnerabilities as well. This vulnerability affects Firefox < 90.
Technical details
- Published
- 2021-08-05
Frequently asked questions
What is CVE-2021-29972?
A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library. Updating the library resolved the issue, and may have remediated other, unknown security vulnerabilities as well. This vulnerability affects Firefox < 90.
Is CVE-2021-29972 actively exploited?
Active exploitation of CVE-2021-29972 has not been confirmed. Its EPSS score was 1.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-29972?
CVE-2021-29972 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2021-29972 affecting your environment?
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