RLSA-2021:3155

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 78.13.0.

Security Fix(es):

• Mozilla: Uninitialized memory in a canvas object could have led to memory corruption (CVE-2021-29980)

• Mozilla: Incorrect instruction reordering during JIT optimization (CVE-2021-29984)

• Mozilla: Race condition when resolving DNS names could have led to memory corruption (CVE-2021-29986)

• Mozilla: Memory corruption as a result of incorrect style treatment (CVE-2021-29988)

• Mozilla: Memory safety bugs fixed in Thunderbird 78.13 (CVE-2021-29989)

• Mozilla: Use-after-free media channels (CVE-2021-29985)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.