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Fencer Intel
medium 6.8

CVE-2011-0064 json

The hb_buffer_ensure function in hb-buffer.c in HarfBuzz, as used in Pango 1.28.3, Firefox, and other products, does not verify that memory…

published 2011-03-07 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0090

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

The hb_buffer_ensure function in hb-buffer.c in HarfBuzz, as used in Pango 1.28.3, Firefox, and other products, does not verify that memory reallocations succeed, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) or possibly execute arbitrary code via crafted OpenType font data that triggers use of an incorrect index.

Patch / fix

  • pango1.0 Debian 14, Debian 13, Debian 12 1.28.3-2~sid1

debian advisories DEBIAN-CVE-2011-0064

  • pango RHEL 6 1.28.1-3.el6_0.5

red hat advisories RHSA-2011:0309

  • pango openSUSE Tumbleweed 1.40.3-1.1

opensuse advisories openSUSE-SU-2024:10578-1

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-2011-0064 updated cvss 6.8

pango: missing memory reallocation failure checking in hb_buffer_ensure

  • Red Hat Enterprise Linux Desktop (v. 6) pango 1.28.1-3.el6_0.5 Red Hat Enterprise Linux Desktop Optional (v. 6) pango 1.28.1-3.el6_0.5 Red Hat Enterprise Linux HPC Node (v. 6) pango 1.28.1-3.el6_0.5 Red Hat Enterprise Linux HPC Node Optional (v. 6) pango 1.28.1-3.el6_0.5 Red Hat Enterprise Linux Server (v. 6) pango 1.28.1-3.el6_0.5 Red Hat Enterprise Linux Workstation (v. 6) pango 1.28.1-3.el6_0.5
    fixed: vendor fix RHSA-2011:0309
  • Red Hat Enterprise Linux 4 pango, evolution28-pango Red Hat Enterprise Linux 5 pango
    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

3.33% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

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.