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Fencer Vulns
low 2.1

CVE-2009-0028 json

The clone system call in the Linux kernel 2.6.28 and earlier allows local users to send arbitrary signals to a parent process from an unpri…

published 2009-02-27 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0040

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
1
Exploit-DB

Summary

The clone system call in the Linux kernel 2.6.28 and earlier allows local users to send arbitrary signals to a parent process from an unprivileged child process by launching an additional child process with the CLONE_PARENT flag, and then letting this new process exit.

Patch / fix

  • kernel RHEL 5 2.6.18-128.1.6.el5
  • kernel-PAE RHEL 5 2.6.18-128.1.6.el5
  • kernel-xen RHEL 5 2.6.18-128.1.6.el5
  • kernel-kdump RHEL 5 2.6.18-128.1.6.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-128.1.6.el5
  • kernel RHEL 4 2.6.9-78.0.22.EL
  • kernel-smp RHEL 4 2.6.9-78.0.22.EL
  • kernel-xenU RHEL 4 2.6.9-78.0.22.EL

red hat advisories RHSA-2009:0326RHSA-2009:0459RHSA-2009:0451

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-2009-0028 updated cvss 2.1

Linux kernel minor signal handling vulnerability

  • Red Hat MRG Realtime for RHEL 5 Server kernel-rt 2.6.24.7-111.el5rt, kernel-rt-trace 2.6.24.7-111.el5rt, kernel-rt-vanilla 2.6.24.7-111.el5rt, kernel-rt-debuginfo-common 2.6.24.7-111.el5rt
    fixed: vendor fix RHSA-2009:0451
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-128.1.6.el5, kernel-PAE 2.6.18-128.1.6.el5, kernel-xen 2.6.18-128.1.6.el5, kernel-kdump 2.6.18-128.1.6.el5, kernel-debuginfo-common 2.6.18-128.1.6.el5
    fixed: vendor fix RHSA-2009:0326
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-78.0.22.EL, kernel-smp 2.6.9-78.0.22.EL, kernel-xenU 2.6.9-78.0.22.EL, kernel-hugemem 2.6.9-78.0.22.EL, kernel-largesmp 2.6.9-78.0.22.EL
    fixed: vendor fix RHSA-2009:0459
  • Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-128.1.6.el5, kernel-PAE 2.6.18-128.1.6.el5, kernel-xen 2.6.18-128.1.6.el5, kernel-kdump 2.6.18-128.1.6.el5, kernel-debuginfo-common 2.6.18-128.1.6.el5
    fixed: vendor fix RHSA-2009:0326
  • Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-78.0.22.EL, kernel-smp 2.6.9-78.0.22.EL, kernel-xenU 2.6.9-78.0.22.EL, kernel-hugemem 2.6.9-78.0.22.EL, kernel-largesmp 2.6.9-78.0.22.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-78.0.22.EL, kernel-smp 2.6.9-78.0.22.EL, kernel-xenU 2.6.9-78.0.22.EL, kernel-hugemem 2.6.9-78.0.22.EL, kernel-largesmp 2.6.9-78.0.22.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-78.0.22.EL, kernel-smp 2.6.9-78.0.22.EL, kernel-xenU 2.6.9-78.0.22.EL, kernel-hugemem 2.6.9-78.0.22.EL, kernel-largesmp 2.6.9-78.0.22.EL
    fixed: vendor fix RHSA-2009:0459

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

Timeline

  1. First public exploit (EDB-32815)
  2. Published

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-32815 Linux Kernel 2.6.x - Cloned Process 'CLONE_PARENT' Local Origin Validation dos, 2009-02-25

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
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.