CVE-2025-11709 — Out-of-bounds Write in Mozilla Firefox

CWE-787 — Out-of-bounds Write12 documents8 sources
Severity
9.8CRITICALNVD
EPSS
0.1%
top 73.29%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedOct 14
Latest updateFeb 2

Description

A compromised web process was able to trigger out of bounds reads and writes in a more privileged process using manipulated WebGL textures. 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:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages3 packages

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

🔴Vulnerability Details

3
CVEList
Out of bounds read/write in a privileged process triggered by WebGL textures↗2025-10-14
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OSV
CVE-2025-11709: A compromised web process was able to trigger out of bounds reads and writes in a more privileged process using manipulated WebGL textures↗2025-10-14
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GHSA
GHSA-2w7r-ggfp-x894: A compromised web process was able to trigger out of bounds reads and writes in a more privileged process using manipulated WebGL textures↗2025-10-14
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
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Red Hat
thunderbird: firefox: Out of bounds read/write in a privileged process triggered by WebGL textures↗2025-10-14
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Debian
CVE-2025-11709: firefox - A compromised web process was able to trigger out of bounds reads and writes in ...↗2025
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Mozilla
Mozilla Foundation Security Advisory 2025-81: CVE-2025-11709↗
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Mozilla
Mozilla Foundation Security Advisory 2025-82: CVE-2025-11709↗
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CVE-2025-11709 — Out-of-bounds Write in Mozilla Firefox | cvebase