CVE-2012-4512

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."

Affected products

Vendor	Product	Affected	Fixed
KDE	Konqueror	4.7.3	—

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Red Hat

Security tracker ↗

Release	Package	Fixed in	Advisory
RHEL 6	kdelibs +3	6:4.3.4-14.el6_3.2	RHSA-2012:1416

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

Konqueror 4.7.3 - Memory Corruption EDB-22406 · dos · Nov 1, 2012

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

RHSA-2012:1416 Red Hat Security Advisory: kdelibs security update Red Hat Security Advisories (RHSA) · Jun 26, 2026

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 possibl…