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Fencer Vulns
medium 4.7

CVE-2009-4271 json

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-bi…

published 2010-03-19 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-4239

cvss
4.7
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

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.

Patch / fix

  • kernel RHEL 4 2.6.9-89.0.23.EL
  • kernel-smp RHEL 4 2.6.9-89.0.23.EL
  • kernel-xenU RHEL 4 2.6.9-89.0.23.EL
  • kernel-hugemem RHEL 4 2.6.9-89.0.23.EL
  • kernel-largesmp RHEL 4 2.6.9-89.0.23.EL

red hat advisories RHSA-2010:0146

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-4271 updated cvss 4.9

kernel: 32bit process on 64bit system can trigger a kernel panic

  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-89.0.23.EL, kernel-smp 2.6.9-89.0.23.EL, kernel-xenU 2.6.9-89.0.23.EL, kernel-hugemem 2.6.9-89.0.23.EL, kernel-largesmp 2.6.9-89.0.23.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-89.0.23.EL, kernel-smp 2.6.9-89.0.23.EL, kernel-xenU 2.6.9-89.0.23.EL, kernel-hugemem 2.6.9-89.0.23.EL, kernel-largesmp 2.6.9-89.0.23.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-89.0.23.EL, kernel-smp 2.6.9-89.0.23.EL, kernel-xenU 2.6.9-89.0.23.EL, kernel-hugemem 2.6.9-89.0.23.EL, kernel-largesmp 2.6.9-89.0.23.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-89.0.23.EL, kernel-smp 2.6.9-89.0.23.EL, kernel-xenU 2.6.9-89.0.23.EL, kernel-hugemem 2.6.9-89.0.23.EL, kernel-largesmp 2.6.9-89.0.23.EL
    fixed: vendor fix RHSA-2010:0146

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.