Skip to main content

Mozilla Firefox CVE-2026-6764

| EUVDEUVD-2026-24105 MEDIUM
Buffer Overflow (CWE-119)
2026-04-21 mozilla GHSA-c6rq-x839-cgp6
Buffer Overflow Mozilla
6.5
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
vuln.today AI
5.4 MEDIUM

Browser DOM exploitation inherently requires a user to load malicious web content, warranting UI:R; all other metrics align with network-reachable, low-complexity, partial-impact profile.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.1 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

Lifecycle Timeline

5
Analysis Generated
Jul 24, 2026 - 07:10 vuln.today
Patch released
Apr 29, 2026 - 02:30 nvd
Patch available
CVSS changed
Apr 21, 2026 - 21:22 NVD
6.5 (None) 6.5 (MEDIUM)
EUVD ID Assigned
Apr 21, 2026 - 13:15 euvd
EUVD-2026-24105
CVE Published
Apr 21, 2026 - 12:40 nvd
MEDIUM 6.5

DescriptionCVE.org

Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.

AnalysisAI

Incorrect boundary conditions in Firefox's DOM Device Interfaces component allow remote attackers to cause limited data corruption and browser instability without authentication or user interaction, per CVSS vector AV:N/AC:L/PR:N/UI:N. Vendor-released patches are confirmed in Firefox 150 and Firefox ESR 140.10, with downstream Red Hat and SUSE advisories also issued. No public exploit has been identified at time of analysis, and EPSS at 0.04% (13th percentile) alongside SSVC exploitation status of 'none' indicate low real-world exploitation likelihood despite the moderate CVSS score.

Technical ContextAI

The vulnerability resides in Mozilla Firefox's DOM (Document Object Model) Device Interfaces subsystem, identified via CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*. CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) classifies this as a boundary condition flaw - where buffer read or write operations exceed allocated memory bounds, potentially corrupting adjacent heap or stack memory. The DOM Device Interfaces layer handles browser interactions with device-level APIs such as media input devices and hardware peripherals; web content processed by this subsystem can trigger the incorrect bounds check. The flaw is architecturally similar to classic buffer over-read or overflow conditions introduced during parsing or processing of device-related DOM events, and is reachable through crafted web content delivered to a vulnerable browser instance.

RemediationAI

Upgrade Mozilla Firefox to version 150 or later, or Firefox ESR to version 140.10 or later - these are the confirmed vendor-patched releases per Mozilla advisories mfsa2026-30, mfsa2026-32, mfsa2026-33, and mfsa2026-34 available at https://www.mozilla.org/security/advisories/. Red Hat Enterprise Linux users should apply the errata packages from RHSA-2026:10767, RHSA-2026:10766, or RHSA-2026:10757 via https://access.redhat.com/errata/; SUSE users should apply available upstream package updates through their package manager. If immediate browser updates are not feasible in managed enterprise environments, restricting end-user access to untrusted or external web content via proxy filtering or browser isolation solutions reduces exposure - though this approach carries operational trade-offs in user productivity. Content Security Policy enforcement on internal web properties does not mitigate this flaw, as the trigger is client-side within the browser's DOM processing layer.

More in Mozilla

View all
CVE-2015-4495 HIGH POC
8.8 Aug 08

The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote
CVE-2013-1690 HIGH POC
8.8 Jun 26

Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before

CVE-2013-0758 CRITICAL POC
9.3 Jan 13

Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderb
CVE-2013-0753 CRITICAL POC
9.3 Jan 13

Use-after-free vulnerability in the serializeToStream implementation in the XMLSerializer component in Mozilla Firefox b
CVE-2012-3993 CRITICAL POC
9.3 Oct 10

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbi
CVE-2013-1710 CRITICAL POC
10.0 Aug 07

The crypto.generateCRMFRequest function in Mozilla Firefox before 23.0, Firefox ESR 17.x before 17.0.8, Thunderbird befo
CVE-2017-3823 HIGH POC
8.8 Feb 01

An issue was discovered in the Cisco WebEx Extension before 1.0.7 on Google Chrome, the ActiveTouch General Plugin Conta
CVE-2014-8636 HIGH POC
7.5 Jan 14

The XrayWrapper implementation in Mozilla Firefox before 35.0 and SeaMonkey before 2.32 does not properly interact with

CVE-2013-0757 CRITICAL POC
9.3 Jan 13

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbi
CVE-2014-1510 CRITICAL POC
9.8 Mar 19

The Web IDL implementation in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and Se
CVE-2014-1511 CRITICAL POC
9.8 Mar 19

Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allow remo
CVE-2013-0643 HIGH
8.8 Feb 27

The Firefox sandbox in Adobe Flash Player before 10.3.183.67 and 11.x before 11.6.602.171 on Windows and Mac OS X, and b

Same weakness CWE-119 – Buffer Overflow

View all
CVE-2020-0796 CRITICAL POC
10.0
CVE-2017-11882 HIGH POC
7.8
CVE-2014-6332 HIGH POC
8.8
CVE-2015-2426 HIGH POC
8.8
CVE-2013-3918 HIGH POC
8.8
CVE-2023-4966 HIGH POC
7.5
CVE-2017-11774 HIGH POC
7.8
CVE-2013-3660 HIGH POC
7.8

Same technique Buffer Overflow

View all
CVE-2017-7269 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2020-0796 CRITICAL POC
10.0
CVE-2019-11043 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Liberty Linux 10 Fixed
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0 Fixed
openSUSE Leap 16.0 Fixed

Share

CVE-2026-6764 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy