vulnerability
Ubuntu: (Multiple Advisories) (CVE-2023-6857): Firefox vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:H/Au:N/C:N/I:C/A:N) | Dec 19, 2023 | Jan 3, 2024 | Mar 27, 2026 |
Severity
5
CVSS
(AV:N/AC:H/Au:N/C:N/I:C/A:N)
Published
Dec 19, 2023
Added
Jan 3, 2024
Modified
Mar 27, 2026
Description
When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary.
*This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected.* This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
Solutions
ubuntu-upgrade-firefoxubuntu-upgrade-thunderbird
Rapid7 Labs
2026 Global Threat Landscape Report
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