Firefox ESR and 1 other: A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library.
CVE-2021-29972 is fixed in 4 products on 2 platforms, first by firefox 90.0+build1-0ubuntu0.18.04.1, released July 14, 2021. It is not reported as exploited. Patch Radar priority: High.
A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library.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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 91.0 | Mozilla Firefox ESR (en-US) 91.0 | Aug 4, 2021 |
| Linux | |||
| firefox · Ubuntu 18.04.6 LTS (bionic) | 90.0+build1-0ubuntu0.18.04.1 | firefox 90.0+build1-0ubuntu0.18.04.1 | Jul 14, 2021 |
| firefox · Ubuntu 20.04 LTS (focal) | 90.0+build1-0ubuntu0.20.04.1 | firefox 90.0+build1-0ubuntu0.20.04.1 | Jul 14, 2021 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 90.0+build1-0ubuntu0.18.04.1 | firefox-geckodriver 90.0+build1-0ubuntu0.18.04.1 | Jul 14, 2021 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 90.0+build1-0ubuntu0.20.04.1 | firefox-geckodriver 90.0+build1-0ubuntu0.20.04.1 | Jul 14, 2021 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 90.0+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 90.0+build1-0ubuntu0.18.04.1 | Jul 14, 2021 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 90.0+build1-0ubuntu0.20.04.1 | firefox-mozsymbols 90.0+build1-0ubuntu0.20.04.1 | Jul 14, 2021 |
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