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Fencer Vulns
low 2.1

CVE-2006-1343 json

net/ipv4/netfilter/ip_conntrack_core.c in Linux kernel 2.4 and 2.6, and possibly net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c in 2.6, doe…

published 2006-03-21 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-1347

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

net/ipv4/netfilter/ip_conntrack_core.c in Linux kernel 2.4 and 2.6, and possibly net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c in 2.6, does not clear sockaddr_in.sin_zero before returning IPv4 socket names from the getsockopt function with SO_ORIGINAL_DST, which allows local users to obtain portions of potentially sensitive memory.

Patch / fix

  • kernel RHEL 4 2.6.9-42.EL
  • kernel-smp RHEL 4 2.6.9-42.EL
  • kernel-hugemem RHEL 4 2.6.9-42.EL
  • kernel-largesmp RHEL 4 2.6.9-42.EL
  • kernel RHEL 3 2.4.21-47.EL
  • kernel-smp RHEL 3 2.4.21-47.EL
  • kernel-BOOT RHEL 3 2.4.21-47.EL
  • kernel-source RHEL 3 2.4.21-47.EL

red hat advisories RHSA-2006:0575RHSA-2006:0437

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-2006-1343 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-47.EL, kernel-smp 2.4.21-47.EL, kernel-BOOT 2.4.21-47.EL, kernel-source 2.4.21-47.EL, kernel-hugemem 2.4.21-47.EL, kernel-unsupported 2.4.21-47.EL, +2 more Red Hat Enterprise Linux AS version 3 kernel 2.4.21-47.EL, kernel-smp 2.4.21-47.EL, kernel-BOOT 2.4.21-47.EL, kernel-source 2.4.21-47.EL, kernel-hugemem 2.4.21-47.EL, kernel-unsupported 2.4.21-47.EL, +2 more
    fixed: vendor fix RHSA-2006:0437
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-42.EL, kernel-smp 2.6.9-42.EL, kernel-hugemem 2.6.9-42.EL, kernel-largesmp 2.6.9-42.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-42.EL, kernel-smp 2.6.9-42.EL, kernel-hugemem 2.6.9-42.EL, kernel-largesmp 2.6.9-42.EL
    fixed: vendor fix RHSA-2006:0575
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2006:0579
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-47.EL, kernel-smp 2.4.21-47.EL, kernel-BOOT 2.4.21-47.EL, kernel-source 2.4.21-47.EL, kernel-hugemem 2.4.21-47.EL, kernel-unsupported 2.4.21-47.EL, +2 more
    fixed: vendor fix RHSA-2006:0437
  • Red Hat Enterprise Linux ES version 4 kernel 2.6.9-42.EL, kernel-smp 2.6.9-42.EL, kernel-hugemem 2.6.9-42.EL, kernel-largesmp 2.6.9-42.EL
    fixed: vendor fix RHSA-2006:0575
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2006:0579
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-47.EL, kernel-smp 2.4.21-47.EL, kernel-BOOT 2.4.21-47.EL, kernel-source 2.4.21-47.EL, kernel-hugemem 2.4.21-47.EL, kernel-unsupported 2.4.21-47.EL, +2 more
    fixed: vendor fix RHSA-2006:0437
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-42.EL, kernel-smp 2.6.9-42.EL, kernel-hugemem 2.6.9-42.EL, kernel-largesmp 2.6.9-42.EL
    fixed: vendor fix RHSA-2006:0575
show 1 more
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2006:0580

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

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

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.