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CVE-2012-5134

25
FAUCET Score

CVE-2012-5134 describes a heap-based buffer underflow in the xmlParseAttValueComplex function of libxml2 versions 2.9.0 and earlier, impacting products like Google Chrome and Apple iOS. This vulnerability carries a CVSS score of 6.8, indicating a medium severity risk where remote attackers could exploit it with medium complexity to achieve denial of service or potentially arbitrary code execution. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 23.0.1271.89CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
23.0.1271.0CPE matchmatch criteria
cpe:2.3:a:google:chrome:23.0.1271.0:*:*:*:*:*:*:*
23.0.1271.1CPE matchmatch criteria
cpe:2.3:a:google:chrome:23.0.1271.1:*:*:*:*:*:*:*
23.0.1271.2CPE matchmatch criteria
cpe:2.3:a:google:chrome:23.0.1271.2:*:*:*:*:*:*:*
23.0.1271.3CPE matchmatch criteria
cpe:2.3:a:google:chrome:23.0.1271.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.38%
Probability of exploitation in next 30 days
EPSS Percentile
90.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0438 is in the 88th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libxml2-0:2.6.26-2.1.15.el5_8.6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxml2-0:2.7.6-8.el6_3.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: mingw32-libxml2-0:2.7.6-6.el6_3
View patch

Vendor Advisories (1)

redhatCVE-2012-5134Important

libxml2: Heap-buffer-underflow in xmlParseAttValueComplex

Nov 27, 2012

References

git.gnome.org / browse/libxml2/commit
googlechromereleases.blogspot.com / 2012/11/stable-channel-update.html
lists.apple.com / archives/security-announce/2013/Oct/msg00009.html
lists.apple.com / archives/security-announce/2013/Sep/msg00006.html
lists.opensuse.org / opensuse-security-announce/2012-12/msg00004.html
lists.opensuse.org / opensuse-security-announce/2013-01/msg00023.html
lists.opensuse.org / opensuse-security-announce/2013-11/msg00002.html
rhn.redhat.com / errata/RHSA-2012-1512.html
rhn.redhat.com / errata/RHSA-2013-0217.html
bugzilla.redhat.com / show_bug.cgi
code.google.com / p/chromium/issues/detail
secunia.com / advisories/51448
secunia.com / advisories/54886
secunia.com / advisories/55568
exchange.xforce.ibmcloud.com / vulnerabilities/80294
support.apple.com / kb/HT5934
support.apple.com / kb/HT6001
debian.org / security/2012/dsa-2580
mandriva.com / security/advisories
securityfocus.com / bid/56684
securitytracker.com / id
ubuntu.com / usn/USN-1656-1