---
cve: "CVE-2023-6857"
severity: "LOW"
cvss: 3.1
epss: "67%"
vendor: "Mozilla"
kev: false
exploited: false
published: "2023-12-19 14:15:07"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T13:55:09+02:00"
---

# CVE-2023-6857

> 3.1 LOW

## Beschreibung

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.

## Referenzen

- <https://bugzilla.mozilla.org/show_bug.cgi?id=1796023>
- <https://www.mozilla.org/security/advisories/mfsa2023-54/>
- <https://www.mozilla.org/security/advisories/mfsa2023-55/>
- <https://www.mozilla.org/security/advisories/mfsa2023-56/>
- <https://www.debian.org/security/2023/dsa-5581>
- <https://www.debian.org/security/2023/dsa-5582>
- <https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html>
- <https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html>
- <https://security.gentoo.org/glsa/202401-10>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-6857) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_