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TI-2009-04052 Aliases CVE-2009-4272GHSA-w5pr-8rvr-3pcp

A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat…

Priority MEDIUM 46CWE-667Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-667 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.11051 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:2.6.18:-:*:*:*:*:*:*2.6.18VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*5.0Running onRed Hat
cpe:2.3:a:redhat:virtualization:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:5.4:*:*:*:*:*:*:*5.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:2.6.18:-:*:*:*:*:*:* Versions 2.6.18 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* Versions 5.0 Running on ·Red Hat
  • cpe:2.3:a:redhat:virtualization:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:5.4:*:*:*:*:*:*:* Versions 5.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2010:0095 Released 2010-02-09 · Red Hat rating Important
    rhev-hypervisor security and bug fix update
    • Red Hat Enterprise Virtualization Hypervisor 5 rhev-hypervisor-5.4-2.1.8.el5_4rhev2_1, rhev-hypervisor-pxe-5.4-2.1.8.el5_4rhev2_1
  • RHSA-2010:0046 Released 2010-01-19 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-164.11.1.el5, kernel-2.6.18-164.11.1.el5.ia64, kernel-PAE-2.6.18-164.11.1.el5 +14
    • Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-164.11.1.el5, kernel-PAE-2.6.18-164.11.1.el5, kernel-PAE-devel-2.6.18-164.11.1.el5 +6

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2010:0046
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2010:0046
Red Hat Enterprise Virtualization Hypervisor 5Fixed RHSA-2010:0095
Not affected: 2 products
  • Red Hat Enterprise Linux (v. 5 server)
  • Red Hat Enterprise Linux Desktop (v. 5 client)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-4272
  2. 2026-10-03 Alias added: GHSA-w5pr-8rvr-3pcp

References

Exploit 1

Advisory 3

Other 7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences