CVE-2005-2456

Name: CVE-2005-2456
Creator: NVD / NIST
Published: 2005-08-04T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.38%

Last modified Jun 16, 2026

CVE-2005-2456 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.38% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.38%

29.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-667

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	2.6.0
Debian	Debian Linux	3.1

References

http://secunia.com/advisories/16298Broken Link
http://secunia.com/advisories/16500Broken Link
http://secunia.com/advisories/17002Broken Link
http://secunia.com/advisories/17073Broken Link
http://secunia.com/advisories/17826Broken Link
http://secunia.com/advisories/18056Broken Link
http://secunia.com/advisories/18059Broken Link
http://www.debian.org/security/2005/dsa-921Mailing List
http://www.debian.org/security/2005/dsa-922Mailing List
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=blobdiff%3Bh=8da3e25b2c4c1f305fd85428d3a9eb62b543bfba%3Bhp=ecade4893a139cc35d4fe345ce70242ede5358c4%3Bhb=a4f1bac62564049ea4718c4624b0fadc9f597c84%3Bf=net/xfrm/xfrm_user.cBroken Link
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a4f1bac62564049ea4718c4624b0fadc9f597c84Broken Link
http://www.mail-archive.com/netdev%40vger.kernel.org/msg00520.htmlPatch
http://www.mandriva.com/security/advisories?name=MDKSA-2005:219Patch, Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDKSA-2005:220Patch, Third Party Advisory
http://www.novell.com/linux/security/advisories/2005_50_kernel.htmlBroken Link
http://www.redhat.com/support/errata/RHSA-2005-514.htmlBroken Link
http://www.redhat.com/support/errata/RHSA-2005-663.htmlBroken Link
http://www.securityfocus.com/archive/1/427980/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/14477Broken Link, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2005/1878Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/21710Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10858Broken Link
https://usn.ubuntu.com/169-1/Broken Link
http://secunia.com/advisories/16298Broken Link
http://secunia.com/advisories/16500Broken Link
http://secunia.com/advisories/17002Broken Link
http://secunia.com/advisories/17073Broken Link
http://secunia.com/advisories/17826Broken Link
http://secunia.com/advisories/18056Broken Link
http://secunia.com/advisories/18059Broken Link
http://www.debian.org/security/2005/dsa-921Mailing List
http://www.debian.org/security/2005/dsa-922Mailing List
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=blobdiff%3Bh=8da3e25b2c4c1f305fd85428d3a9eb62b543bfba%3Bhp=ecade4893a139cc35d4fe345ce70242ede5358c4%3Bhb=a4f1bac62564049ea4718c4624b0fadc9f597c84%3Bf=net/xfrm/xfrm_user.cBroken Link
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a4f1bac62564049ea4718c4624b0fadc9f597c84Broken Link
http://www.mail-archive.com/netdev%40vger.kernel.org/msg00520.htmlPatch
http://www.mandriva.com/security/advisories?name=MDKSA-2005:219Patch, Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDKSA-2005:220Patch, Third Party Advisory
http://www.novell.com/linux/security/advisories/2005_50_kernel.htmlBroken Link
http://www.redhat.com/support/errata/RHSA-2005-514.htmlBroken Link
http://www.redhat.com/support/errata/RHSA-2005-663.htmlBroken Link
http://www.securityfocus.com/archive/1/427980/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/14477Broken Link, Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2005/1878Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/21710Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10858Broken Link
https://usn.ubuntu.com/169-1/Broken Link

Timeline

Published: Aug 4, 2005
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2005-2456?

How severe is CVE-2005-2456?

CVE-2005-2456 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.38% probability of exploitation in the next 30 days.

How do I fix CVE-2005-2456?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2005-2456?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST