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CVE-2015-7220

26
FAUCET Score

CVE-2015-7220 describes a critical buffer overflow vulnerability in the XDRBuffer::grow function within Mozilla Firefox versions prior to 43.0, affecting products like Fedora and openSUSE. This flaw allows remote attackers to trigger a denial of service or potentially achieve further unspecified impact through crafted JavaScript. With a CVSS score of 10.0, it represents a severe risk due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.1CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
<= 42.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
22CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*

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
4.51%
Probability of exploitation in next 30 days
EPSS Percentile
90.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0451 is in the 83rd percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2015-7220Moderate

Mozilla: Buffer overflows found through code inspection (MFSA 2015-144)

Dec 16, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-December/174083.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-December/174253.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2015-12/msg00104.html
lists.opensuse.org / opensuse-updates/2016-02/msg00007.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2016-02/msg00008.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
hg.mozilla.org / mozilla-central/rev/e4b9e72f934f
security.gentoo.org / glsa/201512-10
mozilla.org / security/announce/2015/mfsa2015-144.html
Vendor Advisory
securityfocus.com / bid/79280
securitytracker.com / id/1034426
ubuntu.com / usn/USN-2833-1