CVE-2009-4271

The Linux kernel 2.6.9 through 2.6.17 on the x86_64 and amd64 platforms allows local users to...

4.7 MediumFix available

The Linux kernel 2.6.9 through 2.6.17 on the x86_64 and amd64 platforms allows local users to cause a denial of service (panic) via a 32-bit application that calls mprotect on its Virtual Dynamic Shared Object (VDSO) page and then triggers a segmentation fault.

Exploit likelihood

0.32%Down 0.6 points since Feb 4, 2022

What each source reports

NVD Score used 4.7

Record: CVE-2009-4271
CVSS 2.0: 4.7 MediumAV:L/AC:M/Au:N/C:N/I:N/A:C
Updated: 2026-11-02

CVE List No score

Record: CVE-2009-4271
Updated: 2026-11-02

EUVDEUVD-2009-4239 No score

Record: EUVD-2009-4239
Updated: 2026-11-03

GitHub AdvisoriesGHSA-96m5-5pf8-2pwf No score

The Linux kernel 2.6.9 through 2.6.17 on the x86_64 and amd64 platforms allows local users to...

Record: GHSA-96m5-5pf8-2pwf
Updated: 2026-11-02

Affected products

linux kernel

Affected packages

Affected packages
Package	Affected	Fixed
`kernel` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-debuginfo` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-devel` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-doc` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem-devel` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp-devel` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp-devel` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL

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Affected packages
Package	Affected	Fixed
`kernel-xenU` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-xenU-devel` Red Hat:enterprise_linux:4::as	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-debuginfo` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-devel` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-doc` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem-devel` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp-devel` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp-devel` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-xenU` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-xenU-devel` Red Hat:enterprise_linux:4::desktop	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-debuginfo` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-devel` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-doc` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem-devel` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp-devel` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp-devel` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-xenU` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-xenU-devel` Red Hat:enterprise_linux:4::es	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-debuginfo` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-devel` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-doc` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-hugemem-devel` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-largesmp-devel` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-smp-devel` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-xenU` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL
`kernel-xenU-devel` Red Hat:enterprise_linux:4::ws	before 0:2.6.9-89.0.23.EL	0:2.6.9-89.0.23.EL

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2009-4271 is a medium vulnerability (CVSS 4.7) in Linux Kernel, published March 19, 2010. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 25th percentile. Fixed in kernel 0:2.6.9-89.0.23.EL.

References

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