CVE-2023-6857
5.3
MEDIUM
CVSS 3.1
EPSS 0.23%
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.
How to fix CVE-2023-6857
To remediate CVE-2023-6857, upgrade the affected package to a fixed version below.
- —upgrade to 115.6.0esr-1~deb11u1 or later
- —upgrade to 1:115.6.0-1~deb11u1 or later
Is CVE-2023-6857 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 115.6.0esr-1~deb11u1
- from 0, < 1:115.6.0-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |