Mozilla Thunderbird (en-US) 91.0.3
Mozilla Thunderbird (en-US) 91.0.3, released August 24, 2021, fixes 9 CVEs in Mozilla Thunderbird (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird (en-US) is 159.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Thunderbird (en-US) is 159.0, which also fixes every CVE on this page. Install that instead.
Priority of the 9 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Thunderbird (en-US) | 91.0.3 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2021-29985 | Firefox ESR and 3 others: A use-after-free vulnerability in media channels could have led to memory corruption and a potentially… | 8.8 | 0.0145 | None reported |
| High | CVE-2021-29980 | Firefox ESR and 3 others: Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption… | 8.8 | 0.0140 | None reported |
| High | CVE-2021-29984 | Firefox ESR and 3 others: Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly… | 8.8 | 0.0139 | None reported |
| High | CVE-2021-29988 | Firefox ESR and 3 others: Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds… | 8.8 | 0.0138 | None reported |
| High | CVE-2021-29989 | Firefox ESR and 3 others: Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. | 8.8 | 0.0127 | None reported |
| High | CVE-2021-38493 | Mozilla Firefox ESR and 3 others: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. | 8.8 | 0.0125 | None reported |
| High | CVE-2021-29981 | Firefox ESR and 3 others: An issue present in lowering/register allocation could have led to obscure but deterministic register… | 8.8 | 0.0101 | None reported |
| High | CVE-2021-29991 | Firefox ESR and 3 others: Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. | 8.1 | 0.0091 | None reported |
| Routine | CVE-2021-29982 | Firefox ESR and 3 others: Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting… | 6.5 | 0.0112 | None reported |
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