CVE-2025-11714 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Mozilla Firefox

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory BufferCWE-125 — Out-of-bounds ReadCWE-787 — Out-of-bounds Write12 documents8 sources
Severity
8.8HIGHNVD
EPSS
0.1%
top 82.62%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedOct 14
Latest updateFeb 2

Description

Memory safety bugs present in Firefox ESR 115.28, Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages3 packages

▶NVDmozilla/firefox116.0 — 140.4.0+2
▶NVDmozilla/thunderbird141.0 — 144.0+1
▶Debianmozilla/thunderbird< 1:140.4.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Memory safety bugs fixed in Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thunderbird 144↗2025-10-14
▶
GHSA
GHSA-2p9h-v8v8-2j3w: Memory safety bugs present in Firefox ESR 115↗2025-10-14
▶
OSV
CVE-2025-11714: Memory safety bugs present in Firefox ESR 115↗2025-10-14
▶

📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
▶
Red Hat
thunderbird: firefox: Memory safety bugs↗2025-10-14
▶
Debian
CVE-2025-11714: firefox - Memory safety bugs present in Firefox ESR 115.28, Firefox ESR 140.3, Thunderbird...↗2025
▶
Mozilla
Mozilla Foundation Security Advisory 2025-85: CVE-2025-11714↗
▶
Mozilla
Mozilla Foundation Security Advisory 2025-84: CVE-2025-11714↗
▶
CVE-2025-11714 — Mozilla Firefox vulnerability | cvebase