CVE-2010-0421

CVE-2010-0421 is a medium-severity vulnerability in Gnome Pango with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.3)
• EPSS exploit prediction: 2% (83rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Gnome Pango
• Published: 2010-03-18
• Last modified: 2026-06-16

Description

Array index error in the hb_ot_layout_build_glyph_classes function in pango/opentype/hb-ot-layout.cc in Pango before 1.27.1 allows context-dependent attackers to cause a denial of service (application crash) via a crafted font file, related to building a synthetic Glyph Definition (aka GDEF) table by using this font's charmap and the Unicode property database.

Frequently asked questions

What is CVE-2010-0421?

Array index error in the hb_ot_layout_build_glyph_classes function in pango/opentype/hb-ot-layout.cc in Pango before 1.27.1 allows context-dependent attackers to cause a denial of service (application crash) via a crafted font file, related to building a synthetic Glyph Definition (aka GDEF) table by using this font's charmap and the Unicode property database.

How severe is CVE-2010-0421?

CVE-2010-0421 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2010-0421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-0421?

CVE-2010-0421 affects Gnome Pango. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2010-0421?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-0421 published?

CVE-2010-0421 was published on 2010-03-18 and last updated on 2026-06-16.

References

• http://ftp.gnome.org/pub/GNOME/sources/pango/1.27/pango-1.27.1.tar.bz2
• http://lists.opensuse.org/opensuse-security-announce/2010-04/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html
• http://secunia.com/advisories/39041
• http://securitytracker.com/id?1023711
• http://www.debian.org/security/2010/dsa-2019
• http://www.mandriva.com/security/advisories?name=MDVSA-2010:121
• http://www.redhat.com/support/errata/RHSA-2010-0140.html
• http://www.securityfocus.com/bid/38760
• http://www.vupen.com/english/advisories/2010/0627
• http://www.vupen.com/english/advisories/2010/0661
• http://www.vupen.com/english/advisories/2010/1552
• https://bugzilla.redhat.com/show_bug.cgi?id=555831
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9417

Affected products (1)

• cpe:2.3:a:gnome:pango:*:*:*:*:*:*:*:*

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