CVE-2015-4497
Mozilla: Use-after-free when resizing canvas element during restyling (MFSA 2015-94)
Severity
CriticalRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · August 27, 2015
Updated · November 21, 2025
Description
Use-after-free vulnerability in the CanvasRenderingContext2D implementation in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to execute arbitrary code by leveraging improper interaction between resize events and changes to Cascading Style Sheets (CSS) token sequences for a CANVAS element.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P
CWE-416 · Use After Free