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Fencer Intel
critical 10.0

CVE-2015-4497 json

Use-after-free vulnerability in the CanvasRenderingContext2D implementation in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38…

published 2015-08-29 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-4517

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.0%
EPSS 8.0% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

  • firefox Ubuntu 14.04 LTS 40.0.3+build1-0ubuntu0.14.04.1

ubuntu advisories UBUNTU-CVE-2015-4497

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • firefox RHEL 5 38.2.1-1.el5_11
  • firefox RHEL 6 38.2.1-1.el6_7
  • firefox RHEL 7 38.2.1-1.el7_1

red hat advisories RHSA-2015:1693

  • MozillaFirefox SLES 11 SP2-LTSS, SLES 11 SP1-TERADATA, SLES 11 SP1-LTSS 38.2.1esr-17.1
  • mozilla-nss SLES for SAP 12, SLES 12, SLED 12 +1 more 3.19.2.0-26.2
  • MozillaFirefox SLES for SAP 12, SLES 12, SLED 12 +1 more 38.2.1esr-45.1
  • MozillaFirefox-branding-SLE SLES for SAP 12, SLES 12, SLED 12 31.0-14.1

suse advisories SUSE-SU-2015:1504-1SUSE-SU-2015:1476-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-4497 updated cvss 6.8

Mozilla: Use-after-free when resizing canvas element during restyling (MFSA 2015-94)

  • Red Hat Enterprise Linux (v. 5 server) firefox 38.2.1-1.el5_11 Red Hat Enterprise Linux Client (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Client Optional (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 38.2.1-1.el5_11 Red Hat Enterprise Linux Desktop (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 38.2.1-1.el6_7
    +9 more products
    Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Server (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Server (v. 7) firefox 38.2.1-1.el7_1, firefox 38.2.1-1.ael7b_1 Red Hat Enterprise Linux Server Optional (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Server Optional (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Workstation (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Workstation (v. 7) firefox 38.2.1-1.el7_1 Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 38.2.1-1.el6_7 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 38.2.1-1.el7_1
    fixed: vendor fix RHSA-2015:1693

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

8.01% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.