CVE-2021-29980
Firefox ESR and 3 others: Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption…
CVE-2021-29980 is fixed in 11 products on 2 platforms, first by Mozilla Firefox ESR (en-US) 91.0, released August 4, 2021. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
8.8
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0140
72nd percentile
Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
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 |
| Mozilla Thunderbird (en-US) | 91.0.3 | Mozilla Thunderbird (en-US) 91.0.3 | Aug 24, 2021 |
| Linux | |||
| firefox · RHEL 8 | 0:78.13.0-2.el8_4 | RHSA-2021:3157 | Aug 16, 2021 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 91.0+build2-0ubuntu0.18.04.1 | firefox 91.0+build2-0ubuntu0.18.04.1 | Aug 10, 2021 |
| firefox · Ubuntu 20.04 LTS (focal) | 91.0+build2-0ubuntu0.20.04.1 | firefox 91.0+build2-0ubuntu0.20.04.1 | Aug 10, 2021 |
| firefox · ol 8 | 0:78.13.0-2.0.1.el8_4 | ELSA-2021-3157 | Aug 17, 2021 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 91.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 91.0+build2-0ubuntu0.18.04.1 | Aug 10, 2021 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 91.0+build2-0ubuntu0.20.04.1 | firefox-geckodriver 91.0+build2-0ubuntu0.20.04.1 | Aug 10, 2021 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 91.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 91.0+build2-0ubuntu0.18.04.1 | Aug 10, 2021 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 91.0+build2-0ubuntu0.20.04.1 | firefox-mozsymbols 91.0+build2-0ubuntu0.20.04.1 | Aug 10, 2021 |
| thunderbird · RHEL 8 | 0:78.13.0-1.el8_4 | RHSA-2021:3155 | Aug 16, 2021 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:78.13.0+build1-0ubuntu0.18.04.1 | thunderbird 1:78.13.0+build1-0ubuntu0.18.04.1 | Aug 10, 2021 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:78.13.0+build1-0ubuntu0.20.04.2 | thunderbird 1:78.13.0+build1-0ubuntu0.20.04.2 | Aug 10, 2021 |
| thunderbird · ol 8 | 0:78.13.0-1.0.1.el8_4 | ELSA-2021-3155 | Aug 17, 2021 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:78.13.0+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:78.13.0+build1-0ubuntu0.18.04.1 | Aug 10, 2021 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:78.13.0+build1-0ubuntu0.20.04.2 | thunderbird-gnome-support 1:78.13.0+build1-0ubuntu0.20.04.2 | Aug 10, 2021 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:78.13.0+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:78.13.0+build1-0ubuntu0.18.04.1 | Aug 10, 2021 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:78.13.0+build1-0ubuntu0.20.04.2 | thunderbird-mozsymbols 1:78.13.0+build1-0ubuntu0.20.04.2 | Aug 10, 2021 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:78.13.0+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:78.13.0+build1-0ubuntu0.18.04.1 | Aug 10, 2021 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:78.13.0+build1-0ubuntu0.20.04.2 | xul-ext-calendar-timezones 1:78.13.0+build1-0ubuntu0.20.04.2 | Aug 10, 2021 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:78.13.0+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:78.13.0+build1-0ubuntu0.18.04.1 | Aug 10, 2021 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:78.13.0+build1-0ubuntu0.20.04.2 | xul-ext-gdata-provider 1:78.13.0+build1-0ubuntu0.20.04.2 | Aug 10, 2021 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:78.13.0+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:78.13.0+build1-0ubuntu0.18.04.1 | Aug 10, 2021 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:78.13.0+build1-0ubuntu0.20.04.2 | xul-ext-lightning 1:78.13.0+build1-0ubuntu0.20.04.2 | Aug 10, 2021 |
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