CVE-2015-4488

Use-after-free vulnerability in the StyleAnimationValue class in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 allows remote attackers to have an unspecified impact by leveraging a StyleAnimationValue::operator self assignment.

Published: 2015-08-16 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-4488 is rated Moderate Risk (58.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.60%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-4488

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-13 1.90% 1.60% -0.30%
2 2025-12-28 1.60% 1.90% +0.30%
3 2025-12-27 — 1.60% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-4488

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2015-4488

OS Trackers for CVE-2015-4488

vendor priority summary link
gentoo normal CVE-2015-4488: 1 GLSA(s) (201605-06), 6 atom(s) (dev-libs/nspr, dev-libs/nss, mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-4488
redhat medium — https://access.redhat.com/security/cve/CVE-2015-4488
suse high CVE-2015-4488 severity important: SUSE including 152 source package names (MozillaFirefox-102.11.0-150200.152.87.1, MozillaFirefox-115.10.0-150200.152.134.1, …), 346 product×package rows across 74 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (74 product lines)): Fixed 331, Known Not Affected 15. https://www.suse.com/security/cve/CVE-2015-4488/
ubuntu medium CVE-2015-4488 medium priority: Ubuntu including 2 source packages (firefox, thunderbird), 8 status rows across 4 suites (precise, trusty, upstream, vivid): released 8. https://ubuntu.com/security/CVE-2015-4488

NVD evaluator notes for CVE-2015-4488

Comment: <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>

Affected software / configurations for CVE-2015-4488

Vendor Product Version Raw CPE
oracle solaris 11.3 cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 15.04 cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
opensuse opensuse 13.1 cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
opensuse opensuse 13.2 cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
mozilla firefox <= 39.0.3 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla firefox 38.0 cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
mozilla firefox 38.0.1 cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
mozilla firefox 38.0.5 cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
mozilla firefox 38.1.0 cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
mozilla firefox_os 2.1.0 cpe:2.3:o:mozilla:firefox_os:2.1.0:*:*:*:*:*:*:*

References for CVE-2015-4488

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html
http://lists.opensuse.org/opensuse-updates/2015-08/msg00030.html
http://lists.opensuse.org/opensuse-updates/2015-08/msg00031.html
http://rhn.redhat.com/errata/RHSA-2015-1586.html
http://rhn.redhat.com/errata/RHSA-2015-1682.html
http://www.debian.org/security/2015/dsa-3333
http://www.debian.org/security/2015/dsa-3410
http://www.mozilla.org/security/announce/2015/mfsa2015-90.html Vendor Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securitytracker.com/id/1033247
http://www.securitytracker.com/id/1033372
http://www.ubuntu.com/usn/USN-2702-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2702-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-2702-3
http://www.ubuntu.com/usn/USN-2712-1
https://bugzilla.mozilla.org/show_bug.cgi?id=1176270 Issue Tracking
https://security.gentoo.org/glsa/201605-06
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