CVE-2015-4497

critical
Published 2015-08-29 · Modified 2026-05-06
CVSS v3
CVSS v2
10.0
VIR risk
10.0

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.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — http://www.mozilla.org/security/announce/2015/mfsa2015-94.html

Application impact

VendorProductVersionsFixed
mozillafirefox38.0
mozillafirefox38.0.1
mozillafirefox38.0.5
mozillafirefox38.1.0
mozillafirefox38.2.0
mozillafirefox40.0.2

References

Verify integrity in audit chain (admin only). AS-IS.