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Fencer Vulns
high 7.1

CVE-2005-0449 json

The netfilter/iptables module in Linux before 2.6.8.1 allows remote attackers to cause a denial of service (kernel crash) or bypass firewal…

published 2005-02-16 21 y ago modified 2026-06-16 4 mo ago also EUVD-2005-0450

cvss
7.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.6%
EPSS 4.6% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

The netfilter/iptables module in Linux before 2.6.8.1 allows remote attackers to cause a denial of service (kernel crash) or bypass firewall rules via crafted packets, which are not properly handled by the skb_checksum_help function.

Patch / fix

  • kernel RHEL 4 2.6.9-5.0.5.EL
  • kernel-smp RHEL 4 2.6.9-5.0.5.EL
  • kernel-hugemem RHEL 4 2.6.9-5.0.5.EL
  • kernel RHEL 3 2.4.21-27.0.4.EL
  • kernel-smp RHEL 3 2.4.21-27.0.4.EL
  • kernel-BOOT RHEL 3 2.4.21-27.0.4.EL
  • kernel-source RHEL 3 2.4.21-27.0.4.EL
  • kernel-hugemem RHEL 3 2.4.21-27.0.4.EL

red hat advisories RHSA-2005:366RHSA-2005:293

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-2005-0449 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-27.0.4.EL, kernel-smp 2.4.21-27.0.4.EL, kernel-BOOT 2.4.21-27.0.4.EL, kernel-source 2.4.21-27.0.4.EL, kernel-hugemem 2.4.21-27.0.4.EL, kernel-unsupported 2.4.21-27.0.4.EL, +2 more Red Hat Enterprise Linux AS version 3 kernel 2.4.21-27.0.4.EL, kernel-smp 2.4.21-27.0.4.EL, kernel-BOOT 2.4.21-27.0.4.EL, kernel-source 2.4.21-27.0.4.EL, kernel-hugemem 2.4.21-27.0.4.EL, kernel-unsupported 2.4.21-27.0.4.EL, +2 more
    fixed: vendor fix RHSA-2005:293
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-5.0.5.EL, kernel-smp 2.6.9-5.0.5.EL, kernel-hugemem 2.6.9-5.0.5.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-5.0.5.EL, kernel-smp 2.6.9-5.0.5.EL, kernel-hugemem 2.6.9-5.0.5.EL
    fixed: vendor fix RHSA-2005:366
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2005:283
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-27.0.4.EL, kernel-smp 2.4.21-27.0.4.EL, kernel-BOOT 2.4.21-27.0.4.EL, kernel-source 2.4.21-27.0.4.EL, kernel-hugemem 2.4.21-27.0.4.EL, kernel-unsupported 2.4.21-27.0.4.EL, +2 more
    fixed: vendor fix RHSA-2005:293
  • Red Hat Enterprise Linux ES version 4 kernel 2.6.9-5.0.5.EL, kernel-smp 2.6.9-5.0.5.EL, kernel-hugemem 2.6.9-5.0.5.EL
    fixed: vendor fix RHSA-2005:366
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2005:283
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-27.0.4.EL, kernel-smp 2.4.21-27.0.4.EL, kernel-BOOT 2.4.21-27.0.4.EL, kernel-source 2.4.21-27.0.4.EL, kernel-hugemem 2.4.21-27.0.4.EL, kernel-unsupported 2.4.21-27.0.4.EL, +2 more
    fixed: vendor fix RHSA-2005:293
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-5.0.5.EL, kernel-smp 2.6.9-5.0.5.EL, kernel-hugemem 2.6.9-5.0.5.EL
    fixed: vendor fix RHSA-2005:366
show 1 more
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2005:284

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

4.64% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation
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.