CVE-2009-4272

HIGH

Linux Kernel 2.6.18 on RHEL 5 - Denial of Service via IPv4 Routing Hash Table Collision

Title source: llm
STIX 2.1

Description

A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (deadlock) via crafted packets that force collisions in the IPv4 routing hash table, and trigger a routing "emergency" in which a hash chain is too long. NOTE: this is related to an issue in the Linux kernel before 2.6.31, when the kernel routing cache is disabled, involving an uninitialized pointer and a panic.

References (12)

Core 12
Core References
Exploit, Issue Tracking x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=545411
Third Party Advisory x_refsource_confirm
http://support.avaya.com/css/P8/documents/100073666
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/55808
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2010/01/20/1
Vendor Advisory vendor-advisory x_refsource_redhat
https://rhn.redhat.com/errata/RHSA-2010-0095.html
Vendor Advisory vendor-advisory x_refsource_redhat
https://rhn.redhat.com/errata/RHSA-2010-0046.html
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2010/01/20/6

Scores

CVSS v3 7.5
EPSS 0.1105
EPSS Percentile 95.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-667
Status published
Products (6)
linux/linux_kernel 2.6.18
redhat/enterprise_linux_desktop 5.0
redhat/enterprise_linux_eus 5.4
redhat/enterprise_linux_server 5.0
redhat/enterprise_linux_workstation 5.0
redhat/virtualization 5.0
Published Jan 27, 2010
Tracked Since Feb 18, 2026