CVE-2007-4568

CVE-2007-4568 is a medium-severity vulnerability in X.org X Font Server 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. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Medium (CVSS 2.0 base score 6.8)
• EPSS exploit prediction: 4% (89th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: X.org X Font Server
• Published: 2007-10-05
• Last modified: 2026-06-16

Description

Integer overflow in the build_range function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with crafted size values, which triggers a heap-based buffer overflow.

Frequently asked questions

What is CVE-2007-4568?

Integer overflow in the build_range function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with crafted size values, which triggers a heap-based buffer overflow.

How severe is CVE-2007-4568?

CVE-2007-4568 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2007-4568 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4568?

CVE-2007-4568 primarily affects X.org X Font Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4568?

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

When was CVE-2007-4568 published?

CVE-2007-4568 was published on 2007-10-05 and last updated on 2026-06-16.

References

• http://bugs.freedesktop.org/show_bug.cgi?id=12298
• http://bugs.gentoo.org/show_bug.cgi?id=194606
• http://docs.info.apple.com/article.html?artnum=307430
• http://docs.info.apple.com/article.html?artnum=307562
• http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=602
• http://lists.apple.com/archives/security-announce/2008/Feb/msg00002.html
• http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
• http://lists.freedesktop.org/archives/xorg-announce/2007-October/000416.html
• http://secunia.com/advisories/27040
• http://secunia.com/advisories/27052
• http://secunia.com/advisories/27060
• http://secunia.com/advisories/27168
• http://secunia.com/advisories/27176
• http://secunia.com/advisories/27228
• http://secunia.com/advisories/27240
• http://secunia.com/advisories/27560
• http://secunia.com/advisories/28004
• http://secunia.com/advisories/28536
• http://secunia.com/advisories/28542
• http://secunia.com/advisories/28891
• http://secunia.com/advisories/29420
• http://security.gentoo.org/glsa/glsa-200710-11.xml
• http://sunsolve.sun.com/search/document.do?assetkey=1-26-103114-1
• http://sunsolve.sun.com/search/document.do?assetkey=1-66-200642-1
• http://www.debian.org/security/2007/dsa-1385
• http://www.mandriva.com/security/advisories?name=MDKSA-2007:210
• http://www.novell.com/linux/security/advisories/2007_54_xorg.html
• http://www.redhat.com/support/errata/RHSA-2008-0029.html
• http://www.redhat.com/support/errata/RHSA-2008-0030.html
• http://www.securityfocus.com/archive/1/481432/100/0/threaded

Affected products (3)

• cpe:2.3:a:x.org:x_font_server:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:x.org:x_font_server:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:x.org:x_font_server:1.0.4:*:*:*:*:*:*:*

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