CVE-2007-1003

CVE-2007-1003 is a critical-severity vulnerability in X.org X11 with a CVSS 2.0 base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Integer overflow in ALLOCATE_LOCAL in the ProcXCMiscGetXIDList function in the XC-MISC extension in the X.Org X11 server (xserver) 7.1-1.1.0, and other versions before 20070403, allows remote authenticated users to execute arbitrary code via a large expression, which results in memory corruption.

Frequently asked questions

What is CVE-2007-1003?
Integer overflow in ALLOCATE_LOCAL in the ProcXCMiscGetXIDList function in the XC-MISC extension in the X.Org X11 server (xserver) 7.1-1.1.0, and other versions before 20070403, allows remote authenticated users to execute arbitrary code via a large expression, which results in memory corruption.
How severe is CVE-2007-1003?
CVE-2007-1003 has a CVSS 2.0 base score of 9.0, rated critical severity.
Is CVE-2007-1003 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-1003?
CVE-2007-1003 affects X.org X11. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-1003?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2007-1003 published?
CVE-2007-1003 was published on 2007-04-06 and last updated on 2026-06-16.

References

Affected products (1)

More vulnerabilities in X.org X11

All CVEs affecting X.org X11 →