CVE-2015-4475

CVE-2015-4475 is a high-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: High (CVSS 2.0 base score 7.5)
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Mozilla Firefox
• Published: 2015-08-16
• Last modified: 2026-06-17

Description

The mozilla::AudioSink function in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 mishandles inconsistent sample formats within MP3 audio data, which allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via a malformed file.

Frequently asked questions

What is CVE-2015-4475?

The mozilla::AudioSink function in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 mishandles inconsistent sample formats within MP3 audio data, which allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via a malformed file.

How severe is CVE-2015-4475?

CVE-2015-4475 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2015-4475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4475?

CVE-2015-4475 primarily affects Mozilla Firefox. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-4475?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-4475 published?

CVE-2015-4475 was published on 2015-08-16 and last updated on 2026-06-17.

References

• http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html
• http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html
• 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://www.mozilla.org/security/announce/2015/mfsa2015-80.html
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
• http://www.securityfocus.com/bid/76294
• http://www.securitytracker.com/id/1033247
• http://www.ubuntu.com/usn/USN-2702-1
• http://www.ubuntu.com/usn/USN-2702-2
• http://www.ubuntu.com/usn/USN-2702-3
• https://bugzilla.mozilla.org/show_bug.cgi?id=1175396
• https://security.gentoo.org/glsa/201605-06

Affected products (10)

• cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

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