CVE-2009-4272: n/a vulnerability

CVE-2009-4272: A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL)...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 06:54 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old Linux kernel routing bug tied to Red Hat Enterprise Linux 5. Special network traffic can force routing-cache stress that may deadlock or panic the system, causing denial of service. The sources support availability impact, not data theft or code execution. Most likely exposure is legacy RHEL 5 systems or vendor appliances derived from affected RHEL 5 kernels. Internet-facing or high-traffic IPv4 hosts have higher availability risk. Modern supported Linux kernels are not shown as affected in the provided bundle. Prioritize if any affected legacy Linux system supports critical services or is reachable from untrusted networks. Otherwise, handle through legacy-risk remediation and decommission planning. The business impact is service outage, not confirmed compromise. Mitigation focus: Identify RHEL 5 or Linux 2.6.18-derived systems in inventory.; Apply relevant vendor kernel updates, including Red Hat RHSA-2010-0046 or RHSA-2010-0095 where applicable.; Check appliance vendor advisories for RHEL-derived products, including Avaya references..

Prepared: Jun 28, 2026, 03:36 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 27, 2010, 17:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.redhat.com/show_bug.cgi?id=545411CVE reference · x_refsource_CONFIRM
linux-kernel-routing-dos(55808)CVE reference · vdb-entry, x_refsource_XF
oval:org.mitre.oval:def:11167CVE reference · vdb-entry, signature
RHSA-2010:0095CVE reference · vendor-advisory, x_refsource_REDHAT
oval:org.mitre.oval:def:7026CVE reference · vdb-entry, signature
RHSA-2010:0046CVE reference · vendor-advisory, x_refsource_REDHAT

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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