CVE-2025-11709

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 v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 115.29.0
mozilla	firefox	< 144.0
mozilla	firefox	116.0 — 140.4.0
mozilla	thunderbird	< 144.0

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2025-81/ https://www.mozilla.org/security/advisories/mfsa2025-82/ https://www.mozilla.org/security/advisories/mfsa2025-83/ https://www.mozilla.org/security/advisories/mfsa2025-84/ https://www.mozilla.org/security/advisories/mfsa2025-85/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1989127 https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html

Frequently Asked Questions

What is 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. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-11709? +

CVE-2025-11709 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-11709? +

CVE-2025-11709 affects products from mozilla, specifically: firefox, thunderbird. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-11709? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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