How severe is CVE-2011-0064?

CVE-2011-0064 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-0064 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0064?

CVE-2011-0064 primarily affects Gnome Pango. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0064?

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

When was CVE-2011-0064 published?

CVE-2011-0064 was published on 2011-03-07 and last updated on 2026-06-16.

CVE-2011-0064

CVE-2011-0064 is a medium-severity vulnerability in Gnome Pango with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Gnome Pango
Published: 2011-03-07
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2011-0064?: 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.
How severe is CVE-2011-0064?: CVE-2011-0064 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2011-0064 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0064?: CVE-2011-0064 primarily affects Gnome Pango. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0064?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0064 published?: CVE-2011-0064 was published on 2011-03-07 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:gnome:pango:1.28.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

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