CVE-2011-0020

CVE-2011-0020 is a high-severity vulnerability in Gnome Pango with a CVSS 2.0 base score of 7.6. Its EPSS exploit-prediction score of 19% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

• Severity: High (CVSS 2.0 base score 7.6)
• EPSS exploit prediction: 19% (97th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Gnome Pango
• Published: 2011-01-24
• Last modified: 2026-06-16

Description

Heap-based buffer overflow in the pango_ft2_font_render_box_glyph function in pango/pangoft2-render.c in libpango in Pango 1.28.3 and earlier, when the FreeType2 backend is enabled, allows user-assisted remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file, related to the glyph box for an FT_Bitmap object.

Frequently asked questions

What is CVE-2011-0020?

Heap-based buffer overflow in the pango_ft2_font_render_box_glyph function in pango/pangoft2-render.c in libpango in Pango 1.28.3 and earlier, when the FreeType2 backend is enabled, allows user-assisted remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file, related to the glyph box for an FT_Bitmap object.

How severe is CVE-2011-0020?

CVE-2011-0020 has a CVSS 2.0 base score of 7.6, rated high severity.

Is CVE-2011-0020 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0020?

CVE-2011-0020 primarily affects Gnome Pango. In total, 39 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0020?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-0020 published?

CVE-2011-0020 was published on 2011-01-24 and last updated on 2026-06-16.

References

• http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
• http://openwall.com/lists/oss-security/2011/01/18/6
• http://openwall.com/lists/oss-security/2011/01/20/2
• http://osvdb.org/70596
• http://secunia.com/advisories/42934
• http://secunia.com/advisories/43100
• http://www.redhat.com/support/errata/RHSA-2011-0180.html
• http://www.securityfocus.com/bid/45842
• http://www.securitytracker.com/id?1024994
• http://www.vupen.com/english/advisories/2011/0186
• http://www.vupen.com/english/advisories/2011/0238
• https://bugs.launchpad.net/ubuntu/+source/pango1.0/+bug/696616
• https://bugzilla.gnome.org/show_bug.cgi?id=639882
• https://bugzilla.redhat.com/show_bug.cgi?id=671122
• https://exchange.xforce.ibmcloud.com/vulnerabilities/64832

Affected products (39)

• cpe:2.3:a:gnome:pango:*:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:pango:1.28.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:pango:1.28.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:pango:1.28.2:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:0.20:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:0.21:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:0.22:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:0.23:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:0.24:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:0.25:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:0.26:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.2:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.3:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.4:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.5:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.6:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.7:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.8:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.9:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.10:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.11:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.12:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.13:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.14:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.15:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.16:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.17:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.18:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.19:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.20:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.21:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.22:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.23:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.24:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.25:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.26:*:*:*:*:*:*:*
• cpe:2.3:a:pango:pango:1.27:*:*:*:*:*:*:*

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