CVE-2021-23981
thunderbird - security update
8.1
HIGH
CVSS 3.1
EPSS 0.39%
Description
A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer used to unpack it, resulting in memory corruption and a potentially exploitable information leak or crash. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
How to fix CVE-2021-23981
To remediate CVE-2021-23981, upgrade the affected package to a fixed version below.
- —upgrade to 78.9.0esr-1 or later
- —upgrade to 78.9.0esr-1~deb9u1 or later
- —upgrade to 78.9.0esr-1~deb10u1 or later
- —upgrade to 1:78.9.0-1 or later
- —upgrade to 1:78.9.0-1~deb9u1 or later
- —upgrade to 1:78.9.0-1~deb10u1 or later
Is CVE-2021-23981 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 78.9.0esr-1
- from 0, < 78.9.0esr-1~deb9u1
- from 0, < 78.9.0esr-1~deb10u1
- from 0, < 1:78.9.0-1
- from 0, < 1:78.9.0-1~deb9u1
- from 0, < 1:78.9.0-1~deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |