Riskcovery

CVE-2025-11721

Memory safety bug fixed in Firefox 144 and Thunderbird 144

State
Published
Severity
9.8 Critical
Published
Oct 14, 2025
Updated
Apr 13, 2026
Reserved
Oct 13, 2025

Read the record on cve.org

Description

Memory safety bug present in Firefox 143 and Thunderbird 143. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 144 and Thunderbird 144.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

Affected Products

ProductVersions
FirefoxMozilla
  • 144 and laterNot affected
ThunderbirdMozilla
  • 144 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.