CVE-2025-0247
firefox: thunderbird: Memory safety bugs fixed in Firefox 134 and Thunderbird 134
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 8, 2025
Updated · July 3, 2026
Description
The Mozilla Foundation's Security Advisory: Memory safety bugs are present in Firefox 133 and Thunderbird 133. Some of these bugs show evidence of memory corruption, and with enough effort, some of these could be exploited to run arbitrary code.
Statement
Red Hat Product Security rates this flaw as determined by the Mozilla Foundation Security Advisory.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')