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CVE-2011-0064

23
FAUCET Score

CVE-2011-0064 describes a denial-of-service vulnerability in the HarfBuzz library's hb_buffer_ensure function, affecting products like Pango 1.28.3 and Mozilla Firefox. This flaw allows remote attackers to trigger a NULL pointer dereference and application crash, or potentially execute arbitrary code, via crafted OpenType font data. With a CVSS score of 6.8, it has a medium attack complexity and could lead to partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.28.3CPE matchmatch criteria
cpe:2.3:a:gnome:pango:1.28.3:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.33%
Probability of exploitation in next 30 days
EPSS Percentile
87.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0333 is in the 82nd percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: pango-0:1.28.1-3.el6_0.5
View patch

Vendor Advisories (1)

redhatCVE-2011-0064Critical

pango: missing memory reallocation failure checking in hb_buffer_ensure

Mar 1, 2011

References

cgit.freedesktop.org / harfbuzz/commit
Patch
lists.fedoraproject.org / pipermail/package-announce/2011-March/056065.html
lists.opensuse.org / opensuse-security-announce/2011-04/msg00000.html
bugzilla.mozilla.org / show_bug.cgi
bugzilla.novell.com / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
Patch
build.opensuse.org / request/show/63070
Patch
secunia.com / advisories/43559
Vendor Advisory
secunia.com / advisories/43572
Vendor Advisory
secunia.com / advisories/43578
Vendor Advisory
secunia.com / advisories/43800
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/65770
debian.org / security/2011/dsa-2178
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2011-0309.html
securityfocus.com / bid/46632
ubuntu.com / usn/USN-1082-1
vupen.com / english/advisories/2011/0543
Vendor Advisory
vupen.com / english/advisories/2011/0555
Vendor Advisory
vupen.com / english/advisories/2011/0558
Vendor Advisory
vupen.com / english/advisories/2011/0584
vupen.com / english/advisories/2011/0683