CVE-2026-12293

Published: Jun 16, 2026Modified: Jun 30, 2026

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Affected (2)

Products: Mozilla: Firefox, Thunderbird

2 products

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 152.0.0
Mozilla Thunderbird	Before 152.0.0

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Expired Pointer Dereference

The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.

References (6)

https://bugzilla.mozilla.org/show_bug.cgi?id=2039568

Source: security@mozilla.org

Permissions Required

https://www.mozilla.org/security/advisories/mfsa2026-57/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2026-60/

Source: security@mozilla.org

Vendor Advisory

https://access.redhat.com/security/cve/CVE-2026-12293

Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

https://bugzilla.redhat.com/show_bug.cgi?id=2489216

Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12293.json

Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Timeline

No history available yet.