Name | CVE-2020-26974 |
Description | When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more) |
References | DLA-2496-1, DLA-2497-1, DSA-4813-1, DSA-4815-1 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
firefox (PTS) | sid | 111.0.1-1 | fixed |
firefox-esr (PTS) | buster | 91.12.0esr-1~deb10u1 | fixed |
buster (security) | 102.9.0esr-1~deb10u1 | fixed | |
bullseye | 91.13.0esr-1~deb11u1 | fixed | |
bullseye (security) | 102.9.0esr-1~deb11u1 | fixed | |
bookworm, sid | 102.9.0esr-2 | fixed | |
thunderbird (PTS) | buster | 1:91.12.0-1~deb10u1 | fixed |
buster (security) | 1:102.9.0-1~deb10u1 | fixed | |
bullseye | 1:91.13.0-1~deb11u1 | fixed | |
bullseye (security) | 1:102.9.0-1~deb11u1 | fixed | |
bookworm | 1:102.9.0-1 | fixed | |
sid | 1:102.9.1-1 | 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) | 84.0-1 | |||
firefox-esr | source | stretch | 78.6.0esr-1~deb9u1 | DLA-2496-1 | ||
firefox-esr | source | buster | 78.6.0esr-1~deb10u1 | DSA-4813-1 | ||
firefox-esr | source | (unstable) | 78.6.0esr-1 | |||
thunderbird | source | stretch | 1:78.6.0-1~deb9u1 | DLA-2497-1 | ||
thunderbird | source | buster | 1:78.6.0-1~deb10u1 | DSA-4815-1 | ||
thunderbird | source | (unstable) | 1:78.6.0-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26974
https://www.mozilla.org/en-US/security/advisories/mfsa2020-55/#CVE-2020-26974
https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26974