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Public proof of conceptFix available

CVE-2012-4512

A public proof of concept exists; no exploitation attested.

  • Published2020-02-08
  • WeaknessCWE-843

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The CSS parser (khtml/css/cssparser.cpp) in Konqueror in KDE 4.7.3 allows remote attackers to cause a denial of service (crash) and possibly read memory via a crafted font face source, related to "type confusion."

Timeline

dates in UTC
  1. 2012-11-01Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2012-4512?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2012-4512?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Kde
BranchAffectedFixed in
4.7= 4.7.3no fix published
Redhat enterprise linux
BranchAffectedFixed in
6.0= 6.0no fix published
Redhat enterprise linux desktop
BranchAffectedFixed in
6.0= 6.0no fix published

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • kdelibsRed Hat:enterprise_linux:6::workstationall versions · fixed in 6:4.3.4-14.el6_3.2and 4 other packages
  • kdelibsRed Hat:enterprise_linux:6::serverall versions · fixed in 6:4.3.4-14.el6_3.2and 4 other packages
  • kdelibsRed Hat:enterprise_linux:6::computenodeall versions · fixed in 6:4.3.4-14.el6_3.2and 4 other packages
  • kdelibsRed Hat:enterprise_linux:6::clientall versions · fixed in 6:4.3.4-14.el6_3.2and 4 other packages

Vendor advisories

  • CVE-2012-4512 Red Hat Product Security124 products fixed

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

  • RHSA-2012:1418 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: kdelibs security update

  • RHSA-2012:1416 Red Hat Product Security56 products fixed

    Red Hat Security Advisory: kdelibs security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2012:1418 · 4 productsBefore applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-22406
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.18.8read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • NVDweakness (CWE)CWE-843read 2026-10-23
  • FIRST EPSSEPSS score11.7 %read 2026-11-02
  • Exploit-DBdetectionread 2026-11-02
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2020-02-08
Last Modified
2026-06-16
NVD status
Modified

Frequently asked questions

What is CVE-2012-4512?

The CSS parser (khtml/css/cssparser.cpp) in Konqueror in KDE 4.7.3 allows remote attackers to cause a denial of service (crash) and possibly read memory via a crafted font face source, related to "type confusion."

Is CVE-2012-4512 actively exploited?

Active exploitation of CVE-2012-4512 has not been confirmed. Its EPSS score was 11.7% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2012-4512?

CVE-2012-4512 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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