| Name | CVE-2021-29982 |
| Description | Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting in the potential leak of a single bit of memory. This vulnerability affects Firefox < 91 and Thunderbird < 91. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| NVD severity | medium |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 100.0-1 | fixed |
| thunderbird (PTS) | stretch | 1:68.10.0-1~deb9u1 | fixed |
| stretch (security) | 1:91.8.0-1~deb9u1 | fixed | |
| buster | 1:78.14.0-1~deb10u1 | fixed | |
| buster (security) | 1:91.8.0-1~deb10u1 | fixed | |
| bullseye | 1:78.14.0-1~deb11u1 | fixed | |
| bullseye (security) | 1:91.8.0-1~deb11u1 | fixed | |
| bookworm | 1:91.8.1-1 | fixed | |
| sid | 1:91.9.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| firefox | source | (unstable) | 91.0-1 | |||
| thunderbird | source | (unstable) | (not affected) |
- thunderbird <not-affected> (Thunderbird 78.x not affected, only TB91)
https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29982
https://www.mozilla.org/en-US/security/advisories/mfsa2021-36/#CVE-2021-29982