CVE-2023-6857

MEDIUM

Firefox < 121.0 and Firefox ESR < 115.6 - Race Condition via Symlink Resolution

Title source: llm
STIX 2.1

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.

Scores

CVSS v3 5.3
EPSS 0.0023
EPSS Percentile 45.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Details

CWE
CWE-362
Status published
Products (6)
debian/debian_linux 10.0
debian/debian_linux 11.0
debian/debian_linux 12.0
mozilla/firefox < 121.0
mozilla/firefox_esr < 115.6
mozilla/thunderbird < 115.6
Published Dec 19, 2023
Tracked Since Feb 18, 2026