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Fencer Vulns
medium 5.5

CVE-2005-2456 json

Array index overflow in the xfrm_sk_policy_insert function in xfrm_user.c in Linux kernel 2.6 allows local users to cause a denial of servi…

published 2005-08-04 21 y ago modified 2026-06-16 4 mo ago also EUVD-2005-2457

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Array index overflow in the xfrm_sk_policy_insert function in xfrm_user.c in Linux kernel 2.6 allows local users to cause a denial of service (oops or deadlock) and possibly execute arbitrary code via a p->dir value that is larger than XFRM_POLICY_OUT, which is used as an index in the sock->sk_policy array.

Patch / fix

  • kernel RHEL 3 2.4.21-37.EL
  • kernel-smp RHEL 3 2.4.21-37.EL
  • kernel-BOOT RHEL 3 2.4.21-37.EL
  • kernel-source RHEL 3 2.4.21-37.EL
  • kernel-hugemem RHEL 3 2.4.21-37.EL
  • kernel-unsupported RHEL 3 2.4.21-37.EL
  • kernel-smp-unsupported RHEL 3 2.4.21-37.EL
  • kernel-hugemem-unsupported RHEL 3 2.4.21-37.EL

red hat advisories RHSA-2005:663RHSA-2005:514

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-2005-2456 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more Red Hat Enterprise Linux AS version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more
    fixed: vendor fix RHSA-2005:663
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-22.EL, kernel-smp 2.6.9-22.EL, kernel-hugemem 2.6.9-22.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-22.EL, kernel-smp 2.6.9-22.EL, kernel-hugemem 2.6.9-22.EL
    fixed: vendor fix RHSA-2005:514
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more
    fixed: vendor fix RHSA-2005:663
  • Red Hat Enterprise Linux ES version 4 kernel 2.6.9-22.EL, kernel-smp 2.6.9-22.EL, kernel-hugemem 2.6.9-22.EL
    fixed: vendor fix RHSA-2005:514
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more
    fixed: vendor fix RHSA-2005:663
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-22.EL, kernel-smp 2.6.9-22.EL, kernel-hugemem 2.6.9-22.EL
    fixed: vendor fix RHSA-2005:514

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

0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

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.