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CVE-2015-4486

29
FAUCET Score

CVE-2015-4486 is a critical vulnerability in the libvpx library used by Mozilla Firefox (versions before 40.0 and ESR 38.x before 38.2), as well as products from Canonical, OpenSUSE, and Oracle. It allows remote attackers to execute arbitrary code or cause a denial of service through an out-of-bounds read when processing malformed WebM video data. With a CVSS score of 10.0, this vulnerability is easily exploitable over the network without authentication, leading to complete compromise of confidentiality, integrity, and availability. While there are no known public exploits or Metasploit modules, the vulnerability received some community discussion and media coverage at the time, indicating awareness.

Impacted Technologies

VendorProductVersion(s)CPE
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
15.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
13.1CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
6.61%
Probability of exploitation in next 30 days
EPSS Percentile
93.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0661 is in the 88th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:38.2.0-4.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:38.2.0-4.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:38.2.0-4.el7_1
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2015-4486Critical

Mozilla: Buffer overflows on Libvpx when decoding WebM video (MFSA 2015-89)

Aug 11, 2015

References

lists.opensuse.org / opensuse-security-announce/2015-08/msg00014.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-08/msg00015.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-08/msg00021.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00016.html
lists.opensuse.org / opensuse-security-announce/2015-11/msg00025.html
lists.opensuse.org / opensuse-updates/2015-08/msg00030.html
lists.opensuse.org / opensuse-updates/2015-08/msg00031.html
rhn.redhat.com / errata/RHSA-2015-1586.html
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
security.gentoo.org / glsa/201605-06
mozilla.org / security/announce/2015/mfsa2015-89.html
Vendor Advisory
oracle.com / technetwork/topics/security/bulletinapr2016-2952098.html
Third Party Advisory
securitytracker.com / id/1033247
ubuntu.com / usn/USN-2702-1
Third Party Advisory
ubuntu.com / usn/USN-2702-2
Third Party Advisory
ubuntu.com / usn/USN-2702-3