CVE-2023-6858

Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling

High · published December 19, 2023

CVSS v3.1
8.8
EPSS
2%
Percentile
74.8
In the wild
Unconfirmed
What it is

Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01544 · 74.8th percentile
Published
2023-12-19T13:38Z
EPSS history
Timeline
  • 19 DEC 13:38Z
    Firefox was susceptible to a heap buffer overflow in `nsTextFragment` due to insufficient OOM handling
    cvelistv5