VULNERABILITY INTELLIGENCE
CVE-2007-4990
CVSS score7.5 HIGH
EPSS probability10.74%
CISA KEVNot currently listed
Published2007-10-05
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:P/A:P
Description
The swap_char2b 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 that specify an arbitrary number of bytes to be swapped on the heap, which triggers heap corruption.