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Fencer Intel
critical 9.3

CVE-2011-3193 json

Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pang…

published 2012-06-16 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3157

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.2%
EPSS 7.2% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted font file.

Patch / fix

  • gnome pango 1.25.1
  • qt qt 4.7.4
  • pango1.0 Debian 14, Debian 13, Debian 12 1.28.3-1

debian advisories DEBIAN-CVE-2011-3193

  • qt RHEL 6 1:4.6.2-20.el6
  • qt-x11 RHEL 6 1:4.6.2-20.el6
  • qt-odbc RHEL 6 1:4.6.2-20.el6
  • qt-demos RHEL 6 1:4.6.2-20.el6
  • qt-mysql RHEL 6 1:4.6.2-20.el6
  • qt-sqlite RHEL 6 1:4.6.2-20.el6
  • qt-examples RHEL 6 1:4.6.2-20.el6
  • qt-postgresql RHEL 6 1:4.6.2-20.el6

red hat advisories RHSA-2011:1328RHSA-2011:1327RHSA-2011:1326RHSA-2011:1325RHSA-2011:1324RHSA-2011:1323

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-3193 updated cvss 5.1

qt/harfbuzz buffer overflow

  • Red Hat Enterprise Linux (v. 5 server) qt4 4.2.1-1.el5_7.1, pango 1.14.9-8.el5_7.3, qt4-odbc 4.2.1-1.el5_7.1, qt4-mysql 4.2.1-1.el5_7.1, qt4-sqlite 4.2.1-1.el5_7.1, qt4-postgresql 4.2.1-1.el5_7.1
    fixed: vendor fix RHSA-2011:1326
  • Red Hat Enterprise Linux AS version 4 frysk 0.0.1.2007.08.03-8.el4, evolution28-pango 1.14.9-13.el4_11
    fixed: vendor fix RHSA-2011:1325
  • Red Hat Enterprise Linux Desktop (v. 5 client) qt4 4.2.1-1.el5_7.1, pango 1.14.9-8.el5_7.3, qt4-odbc 4.2.1-1.el5_7.1, qt4-mysql 4.2.1-1.el5_7.1, qt4-sqlite 4.2.1-1.el5_7.1, qt4-postgresql 4.2.1-1.el5_7.1
    fixed: vendor fix RHSA-2011:1326
  • Red Hat Enterprise Linux Desktop (v. 6) qt 4.6.2-20.el6, qt-x11 4.6.2-20.el6, qt-odbc 4.6.2-20.el6, qt-mysql 4.6.2-20.el6, qt-sqlite 4.6.2-20.el6, qt-postgresql 4.6.2-20.el6, +1 more Red Hat Enterprise Linux Desktop Optional (v. 6) qt 4.6.2-20.el6, qt-demos 4.6.2-20.el6, qt-examples 4.6.2-20.el6
    fixed: vendor fix RHSA-2011:1328
  • Red Hat Enterprise Linux Desktop version 4 frysk 0.0.1.2007.08.03-8.el4, evolution28-pango 1.14.9-13.el4_11 Red Hat Enterprise Linux ES version 4 frysk 0.0.1.2007.08.03-8.el4, evolution28-pango 1.14.9-13.el4_11
    fixed: vendor fix RHSA-2011:1325
  • Red Hat Enterprise Linux HPC Node (v. 6) qt 4.6.2-20.el6, qt-x11 4.6.2-20.el6, qt-sqlite 4.6.2-20.el6, phonon-backend-gstreamer 4.6.2-20.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) qt 4.6.2-20.el6, qt-x11 4.6.2-20.el6, qt-odbc 4.6.2-20.el6, qt-demos 4.6.2-20.el6, qt-mysql 4.6.2-20.el6, qt-sqlite 4.6.2-20.el6, +3 more Red Hat Enterprise Linux Server (v. 6) qt 4.6.2-20.el6, qt 4.6.2-17.el6_1.1, qt-x11 4.6.2-20.el6, qt-odbc 4.6.2-20.el6, qt-mysql 4.6.2-20.el6, qt-sqlite 4.6.2-20.el6, +8 more Red Hat Enterprise Linux Server Optional (v. 6) qt 4.6.2-20.el6, qt 4.6.2-17.el6_1.1, qt-demos 4.6.2-20.el6, qt-examples 4.6.2-20.el6, qt-demos 4.6.2-17.el6_1.1, qt-examples 4.6.2-17.el6_1.1 Red Hat Enterprise Linux Workstation (v. 6) qt 4.6.2-20.el6, qt-x11 4.6.2-20.el6, qt-odbc 4.6.2-20.el6, qt-mysql 4.6.2-20.el6, qt-sqlite 4.6.2-20.el6, qt-postgresql 4.6.2-20.el6, +1 more Red Hat Enterprise Linux Workstation Optional (v. 6) qt 4.6.2-20.el6, qt-demos 4.6.2-20.el6, qt-examples 4.6.2-20.el6
    fixed: vendor fix RHSA-2011:1328
  • Red Hat Enterprise Linux WS version 4 frysk 0.0.1.2007.08.03-8.el4, evolution28-pango 1.14.9-13.el4_11
    fixed: vendor fix RHSA-2011:1325
  • Red Hat RHEL Desktop Workstation (v. 5 client) qt4 4.2.1-1.el5_7.1, pango 1.14.9-8.el5_7.3
    fixed: vendor fix RHSA-2011:1326
show 1 more
  • Red Hat Enterprise Linux 4 qt, pango, freetype Red Hat Enterprise Linux 5 qt, freetype Red Hat Enterprise Linux 6 qt3, pango, freetype, qt3-ODBC, qt3-MySQL, qt3-config, +4 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.17% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.