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Fencer Vulns
high 7.5

CVE-2006-4997 json

The clip_mkip function in net/atm/clip.c of the ATM subsystem in Linux kernel allows remote attackers to cause a denial of service (panic)…

published 2006-10-09 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-4983

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.0%
EPSS 5.0% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The clip_mkip function in net/atm/clip.c of the ATM subsystem in Linux kernel allows remote attackers to cause a denial of service (panic) via unknown vectors that cause the ATM subsystem to access the memory of socket buffers after they are freed (freed pointer dereference).

Patch / fix

  • linux linux_kernel 2.6.18
  • kernel RHEL 3 2.4.21-47.0.1.EL
  • kernel-smp RHEL 3 2.4.21-47.0.1.EL
  • kernel-BOOT RHEL 3 2.4.21-47.0.1.EL
  • kernel-source RHEL 3 2.4.21-47.0.1.EL
  • kernel-hugemem RHEL 3 2.4.21-47.0.1.EL
  • kernel-unsupported RHEL 3 2.4.21-47.0.1.EL
  • kernel-smp-unsupported RHEL 3 2.4.21-47.0.1.EL
  • kernel-hugemem-unsupported RHEL 3 2.4.21-47.0.1.EL

red hat advisories RHSA-2006:0710RHSA-2007:0013RHSA-2007:0012RHSA-2006:0689

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-2006-4997 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more
    fixed: vendor fix RHSA-2006:0710
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 kernel 2.4.9-e.71, kernel 2.4.18-e.64, kernel-smp 2.4.9-e.71, kernel-BOOT 2.4.9-e.71, kernel-smp 2.4.18-e.64, kernel-source 2.4.9-e.71, +3 more
    fixed: vendor fix RHSA-2007:0012
  • Red Hat Enterprise Linux AS version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more
    fixed: vendor fix RHSA-2006:0710
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-42.0.3.EL, kernel-smp 2.6.9-42.0.3.EL, kernel-hugemem 2.6.9-42.0.3.EL, kernel-largesmp 2.6.9-42.0.3.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-42.0.3.EL, kernel-smp 2.6.9-42.0.3.EL, kernel-hugemem 2.6.9-42.0.3.EL, kernel-largesmp 2.6.9-42.0.3.EL
    fixed: vendor fix RHSA-2006:0689
  • Red Hat Enterprise Linux ES version 2.1 kernel 2.4.9-e.71, kernel-smp 2.4.9-e.71, kernel-BOOT 2.4.9-e.71, kernel-source 2.4.9-e.71, kernel-summit 2.4.9-e.71, kernel-enterprise 2.4.9-e.71
    fixed: vendor fix RHSA-2007:0013
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more
    fixed: vendor fix RHSA-2006:0710
  • Red Hat Enterprise Linux ES version 4 kernel 2.6.9-42.0.3.EL, kernel-smp 2.6.9-42.0.3.EL, kernel-hugemem 2.6.9-42.0.3.EL, kernel-largesmp 2.6.9-42.0.3.EL
    fixed: vendor fix RHSA-2006:0689
  • Red Hat Enterprise Linux WS version 2.1 kernel 2.4.9-e.71, kernel-smp 2.4.9-e.71, kernel-BOOT 2.4.9-e.71, kernel-source 2.4.9-e.71, kernel-summit 2.4.9-e.71, kernel-enterprise 2.4.9-e.71
    fixed: vendor fix RHSA-2007:0013
show 3 more
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more
    fixed: vendor fix RHSA-2006:0710
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-42.0.3.EL, kernel-smp 2.6.9-42.0.3.EL, kernel-hugemem 2.6.9-42.0.3.EL, kernel-largesmp 2.6.9-42.0.3.EL
    fixed: vendor fix RHSA-2006:0689
  • Red Hat Linux Advanced Workstation 2.1 kernel 2.4.18-e.64, kernel-smp 2.4.18-e.64, kernel-source 2.4.18-e.64
    fixed: vendor fix RHSA-2007:0012

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

4.96% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.redhat.com http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=206265 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
Technology feeds

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.