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Fencer Vulns
high 7.2

CVE-2006-3739 json

Integer overflow in the CIDAFM function in X.Org 6.8.2 and XFree86 X server allows local users to execute arbitrary code via crafted Adobe…

published 2006-09-13 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-3733

cvss
7.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

Integer overflow in the CIDAFM function in X.Org 6.8.2 and XFree86 X server allows local users to execute arbitrary code via crafted Adobe Font Metrics (AFM) files with a modified number of character metrics (StartCharMetrics), which leads to a heap-based buffer overflow.

Patch / fix

  • libxfont Debian 14, Debian 13, Debian 12 1:1.2.2-1

debian advisories DEBIAN-CVE-2006-3739

  • XFree86 RHEL 3 4.3.0-113.EL
  • XFree86-sdk RHEL 3 4.3.0-113.EL
  • XFree86-twm RHEL 3 4.3.0-113.EL
  • XFree86-xdm RHEL 3 4.3.0-113.EL
  • XFree86-xfs RHEL 3 4.3.0-113.EL
  • XFree86-libs RHEL 3 4.3.0-113.EL
  • XFree86-Xvfb RHEL 3 4.3.0-113.EL
  • XFree86-tools RHEL 3 4.3.0-113.EL

red hat advisories RHSA-2006:0666RHSA-2006:0665

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2006-3739 updated

security flaw

  • Red Hat Desktop version 3 XFree86 4.3.0-113.EL, XFree86-sdk 4.3.0-113.EL, XFree86-twm 4.3.0-113.EL, XFree86-xdm 4.3.0-113.EL, XFree86-xfs 4.3.0-113.EL, XFree86-libs 4.3.0-113.EL, +22 more Red Hat Enterprise Linux AS version 3 XFree86 4.3.0-113.EL, XFree86-sdk 4.3.0-113.EL, XFree86-twm 4.3.0-113.EL, XFree86-xdm 4.3.0-113.EL, XFree86-xfs 4.3.0-113.EL, XFree86-libs 4.3.0-113.EL, +22 more
    fixed: vendor fix RHSA-2006:0666
  • Red Hat Enterprise Linux AS version 4 xorg-x11 6.8.2-1.EL.13.37.2, xorg-x11-sdk 6.8.2-1.EL.13.37.2, xorg-x11-twm 6.8.2-1.EL.13.37.2, xorg-x11-xdm 6.8.2-1.EL.13.37.2, xorg-x11-xfs 6.8.2-1.EL.13.37.2, xorg-x11-libs 6.8.2-1.EL.13.37.2, +9 more Red Hat Enterprise Linux Desktop version 4 xorg-x11 6.8.2-1.EL.13.37.2, xorg-x11-sdk 6.8.2-1.EL.13.37.2, xorg-x11-twm 6.8.2-1.EL.13.37.2, xorg-x11-xdm 6.8.2-1.EL.13.37.2, xorg-x11-xfs 6.8.2-1.EL.13.37.2, xorg-x11-libs 6.8.2-1.EL.13.37.2, +9 more
    fixed: vendor fix RHSA-2006:0665
  • Red Hat Enterprise Linux ES version 3 XFree86 4.3.0-113.EL, XFree86-sdk 4.3.0-113.EL, XFree86-twm 4.3.0-113.EL, XFree86-xdm 4.3.0-113.EL, XFree86-xfs 4.3.0-113.EL, XFree86-libs 4.3.0-113.EL, +22 more
    fixed: vendor fix RHSA-2006:0666
  • Red Hat Enterprise Linux ES version 4 xorg-x11 6.8.2-1.EL.13.37.2, xorg-x11-sdk 6.8.2-1.EL.13.37.2, xorg-x11-twm 6.8.2-1.EL.13.37.2, xorg-x11-xdm 6.8.2-1.EL.13.37.2, xorg-x11-xfs 6.8.2-1.EL.13.37.2, xorg-x11-libs 6.8.2-1.EL.13.37.2, +9 more
    fixed: vendor fix RHSA-2006:0665
  • Red Hat Enterprise Linux WS version 3 XFree86 4.3.0-113.EL, XFree86-sdk 4.3.0-113.EL, XFree86-twm 4.3.0-113.EL, XFree86-xdm 4.3.0-113.EL, XFree86-xfs 4.3.0-113.EL, XFree86-libs 4.3.0-113.EL, +22 more
    fixed: vendor fix RHSA-2006:0666
  • Red Hat Enterprise Linux WS version 4 xorg-x11 6.8.2-1.EL.13.37.2, xorg-x11-sdk 6.8.2-1.EL.13.37.2, xorg-x11-twm 6.8.2-1.EL.13.37.2, xorg-x11-xdm 6.8.2-1.EL.13.37.2, xorg-x11-xfs 6.8.2-1.EL.13.37.2, xorg-x11-libs 6.8.2-1.EL.13.37.2, +9 more
    fixed: vendor fix RHSA-2006:0665

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.