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CVE-2015-8806

21
FAUCET Score

CVE-2015-8806 is a denial-of-service vulnerability in libxml2's dict.c, affecting various Canonical, Debian, and XMLsoft products. A remote attacker can trigger a heap-based buffer over-read and application crash by sending a crafted HTML document with an unexpected character after "<!DOCTYPE html". This vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity and high impact on availability, requiring no user interaction or privileges. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.9.4CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
15.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.96%
Probability of exploitation in next 30 days
EPSS Percentile
91.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0496 is in the 85th percentile among its peer group of 51,553 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

Patch Available

Vendor Patches (1)

rubygemspatch availablevia ghsa
Product: nokogiriFixed in: 1.6.8

Vendor Advisories (2)

rubygemsGHSA-7hp2-xwpj-95jqhigh

Denial of service or RCE from libxml2 and libxslt

Sep 17, 2018
redhatCVE-2015-8806

libxml2: heap-buffer overread in dict.c

Jan 26, 2016

References

bugzilla.gnome.org / show_bug.cgi
Issue TrackingVendor Advisory
security.gentoo.org / glsa/201701-37
Third Party Advisory
debian.org / security/2016/dsa-3593
Third Party Advisory
openwall.com / lists/oss-security/2016/02/03/5
Mailing ListThird Party Advisory
oracle.com / technetwork/topics/security/bulletinjul2016-3090568.html
Third Party Advisory
securityfocus.com / bid/82071
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2994-1
Third Party Advisory