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CVE-2009-4272

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

7.5 High

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

11.1%Up 8.9 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

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.

Record
CVE-2009-4272
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
7.8 HighAV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness
CWE-667
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2009-4272
Updated
2026-11-02
EUVDEUVD-2009-4240 No score

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.

Record
EUVD-2009-4240
Updated
2026-11-03
GitHub AdvisoriesGHSA-w5pr-8rvr-3pcp 7.5

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

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.

Record
GHSA-w5pr-8rvr-3pcp
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-20, CWE-667
Updated
2026-11-02
OSVBELL-CVE-2009-4272 7.5

CVE-2009-4272 does not affect BellSoft software

Record
BELL-CVE-2009-4272
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kernel
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-PAE
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-PAE-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-PAE-devel
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debug
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debug-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debug-devel
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debuginfo-common
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-devel
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
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Affected packages
PackageAffectedFixed
kernel-doc
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-xen
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-xen-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-xen-devel
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-PAE
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-PAE-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-PAE-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debug
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debug-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debug-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-debuginfo-common
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-doc
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-kdump
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-kdump-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-kdump-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-xen
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-xen-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
kernel-xen-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:2.6.18-164.11.1.el5
0:2.6.18-164.11.1.el5
rhev-hypervisor
Red Hat:enterprise_linux:5::hypervisor
From an advisory covering 8 CVEs
 before 0:5.4-2.1.8.el5_4rhev2_1
0:5.4-2.1.8.el5_4rhev2_1
rhev-hypervisor-pxe
Red Hat:enterprise_linux:5::hypervisor
From an advisory covering 8 CVEs
 before 0:5.4-2.1.8.el5_4rhev2_1
0:5.4-2.1.8.el5_4rhev2_1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-4272 is a high vulnerability (CVSS 7.5) in Linux Kernel, published January 27, 2010. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 11.1%, the 95th percentile. No source names a fixed version.

References

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