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CVE-2012-4512

43
FAUCET Score

CVE-2012-4512 describes a denial-of-service vulnerability with potential memory reading in Konqueror (KDE 4.7.3) due to a type confusion error in its CSS parser when handling crafted font face sources. This high-severity vulnerability (CVSS 8.8) is easily exploitable over a network with user interaction, leading to a crash and possible information disclosure. While not actively exploited in the wild and lacking significant community discussion or media coverage, a public proof-of-concept for memory corruption exists on ExploitDB.

Impacted Technologies

VendorProductVersion(s)CPE
4.7.3CPE matchmatch criteria
cpe:2.3:a:kde:kde:4.7.3:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
6.3CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_eus:6.3:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
11.66%
Probability of exploitation in next 30 days
EPSS Percentile
95.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-22406 · Nov 1, 2012
This CVE's current EPSS score of 0.1166 is in the 96th percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kdelibs-6:4.3.4-14.el6_3.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux Desktop (v. 6)
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux HPC Node (v. 6)
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux Server (v. 6)
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux Workstation (v. 6)
View patch

Vendor Advisories (1)

redhatCVE-2012-4512Critical

kdelibs: Heap-based buffer overflow when parsing location of a font face source

Oct 30, 2012

References

archives.neohapsis.com / archives/bugtraq/2012-11/0005.html
Broken LinkThird Party Advisory
em386.blogspot.com / 2010/12/webkit-css-type-confusion.html
ExploitThird Party Advisory
quickgit.kde.org / index.php
Broken LinkVendor Advisory
rhn.redhat.com / errata/RHSA-2012-1416.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2012-1418.html
Third Party Advisory
secunia.com / advisories/51097
Not ApplicableThird Party Advisory
secunia.com / advisories/51145
Not ApplicableThird Party Advisory
nth-dimension.org.uk / pub/NDSA20121010.txt.asc
Third Party Advisory
openwall.com / lists/oss-security/2012/10/11/11
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2012/10/30/6
Mailing ListThird Party Advisory
securitytracker.com / id
Third Party AdvisoryVDB Entry