CVE-2018-18493

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.

Metrics

CVSS 3.0 9.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-119

Affected software

VendorProductVersions
MozillaThunderbird>= unspecified, < 60.4
MozillaFirefox ESR>= unspecified, < 60.4
MozillaFirefox>= unspecified, < 64

References

Timeline

Published
Feb 28, 2019
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2018-18493: Critical severity, CVSS 9.8 | Vulnix