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Firefox CVE-2026-6773

| EUVDEUVD-2026-24114 HIGH
Integer Overflow or Wraparound (CWE-190)
2026-04-21 mozilla GHSA-7625-jhq2-5p8g
Integer Overflow Mozilla Buffer Overflow Red Hat Suse
High
Disputed · 7.5 NVD
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Severity by source

Sources disagree (Low–High)
NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE
HIGH
qualitative
Red Hat
3.4 LOW
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

8
Patch released
Apr 29, 2026 - 02:30 nvd
Patch available
Analysis Updated
Apr 22, 2026 - 00:34 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Apr 22, 2026 - 00:22 vuln.today
cvss_changed
Analysis Generated
Apr 21, 2026 - 20:25 vuln.today
CVSS changed
Apr 21, 2026 - 20:22 NVD
7.5 (HIGH)
EUVD ID Assigned
Apr 21, 2026 - 13:15 euvd
EUVD-2026-24114
Analysis Generated
Apr 21, 2026 - 13:15 vuln.today
CVE Published
Apr 21, 2026 - 12:41 nvd
HIGH 7.5

DescriptionCVE.org

Denial-of-service due to integer overflow in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 150.

AnalysisAI

Integer overflow in Firefox's WebGPU graphics component enables remote denial-of-service attacks against default browser configurations. Attackers can trigger high availability impact via network-accessible exploitation without authentication or user interaction. Mozilla patched this in Firefox 150, with SSVC framework rating it automatable with partial technical impact despite CVSS 7.5 severity. No active exploitation confirmed and EPSS data not provided for risk quantification.

Technical ContextAI

WebGPU is a modern web graphics API providing JavaScript access to GPU capabilities for rendering and computation. This vulnerability stems from CWE-190 (Integer Overflow or Wraparound), where arithmetic operations on integer values in WebGPU processing exceed maximum representable values, causing unexpected behavior. The overflow occurs during graphics pipeline operations, likely in buffer size calculations or memory allocation routines. CPE data identifies Mozilla Firefox versions prior to 150 as affected (cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*). Integer overflows in graphics components are particularly dangerous because they can corrupt memory management structures, potentially cascading from denial-of-service to memory corruption exploits if boundary conditions align, though this CVE's CVSS vector indicates only availability impact was confirmed.

RemediationAI

Upgrade to Mozilla Firefox version 150 or later, which contains the vendor-released patch addressing the integer overflow in WebGPU graphics processing. Download the latest Firefox release from mozilla.org or use built-in browser update mechanisms (Menu > Help > About Firefox triggers automatic update check). Users unable to immediately upgrade should disable WebGPU functionality by navigating to about:config and setting dom.webgpu.enabled to false, though this workaround breaks WebGPU-dependent web applications and games. For enterprise deployments, push Firefox 150 through existing software distribution mechanisms and verify update compliance. Mozilla security advisory MFSA2026-30 at https://www.mozilla.org/security/advisories/mfsa2026-30/ provides official guidance, with additional technical details in Bugzilla bug 2015959. Disabling WebGPU eliminates attack surface but sacrifices emerging graphics capabilities; organizations should weigh this trade-off based on user requirements and threat model.

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Same weakness CWE-190 – Integer Overflow or Wraparound

View all
CVE-2013-2729 CRITICAL POC
9.8
CVE-2015-8651 HIGH
8.8
CVE-2012-5054 HIGH POC
8.8
CVE-2014-0569 CRITICAL POC
9.3
CVE-2017-3599 HIGH POC
7.5
CVE-2017-7529 HIGH
7.5
CVE-2016-1010 HIGH
8.8
CVE-2013-3940 CRITICAL
9.3

Same technique Integer Overflow

View all
CVE-2014-0497 CRITICAL POC
9.8
CVE-2013-2729 CRITICAL POC
9.8
CVE-2015-8651 HIGH
8.8
CVE-2012-5054 HIGH POC
8.8
CVE-2014-0569 CRITICAL POC
9.3
CVE-2017-3599 HIGH POC
7.5
CVE-2017-7529 HIGH
7.5
CVE-2016-1010 HIGH
8.8

Vendor StatusVendor

SUSE

Severity: High
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Fixed

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CVE-2026-6773 vulnerability details – vuln.today
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