CVE-2009-4141

highpriority · track · 39EPSS 0.010 · 62 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

0.97% (62nd) EPSS

CVSS 7.2 · high

Is it mine?

160 products

Check your exposure

Who says so?

3 sources

enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-27

Use-after-free vulnerability in the fasync_helper function in fs/fcntl.c in the Linux kernel before 2.6.33-rc4-git1 allows local users to gain privileges via vectors that include enabling O_ASYNC (aka FASYNC or FIOASYNC) on a locked file, and then closing this file.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedkernel-rt-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-0:2.6.24.7-149.el5rt.src as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debug-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debug-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debug-debuginfo-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debug-debuginfo-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debug-devel-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debug-devel-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debuginfo-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debuginfo-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debuginfo-common-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-debuginfo-common-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-devel-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-devel-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-doc-0:2.6.24.7-149.el5rt.noarch as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-trace-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-trace-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-trace-debuginfo-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-trace-debuginfo-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-trace-devel-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-trace-devel-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-vanilla-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-vanilla-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-vanilla-debuginfo-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-vanilla-debuginfo-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-vanilla-devel-0:2.6.24.7-149.el5rt.i686 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161
Fixedkernel-rt-vanilla-devel-0:2.6.24.7-149.el5rt.x86_64 as a component of MRG Realtime for RHEL 5 Serverredhat_csaf
Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259
https://access.redhat.com/errata/RHSA-2010:0161

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.2

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v2.06.5mediumAV:L/AC:L/Au:N/C:C/I:C/A:C/E:POCsecondary · CVSS-BT (t0sche)

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Csecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimaryCWE-910US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-33523Linux Kernel < 2.6.28 - 'fasync_helper()' Local Privilege Escalationfunctional · exploit_db

affected products (160)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
linux linux kernel≤ 2.6.33nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.0nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.1nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.10nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.1nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.10nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.11nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.12nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.2nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.3nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.4nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.5nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.6nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.7nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.8nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.11.9nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.12nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux kernel= 2.6.12.1nvdUScpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

showing 20 of 160

advisories (1)

Vendor and ecosystem advisories describing this.

RHSA-2010:0161Red Hat Security Advisory: kernel-rt security and bug fix update2010-03-23csaf · redhat_csafUS
Updated kernel-rt packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise MRG 1.2. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd redhat_csaf NVD CVE.org MITRE

published 2010-01-19modified 2026-06-16

related (3,726)

Related entries.

ID	severity	EPSS	exploitable	published
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CVE-2018-0179US	medium5.9OT critical	4.93% (92nd)	KEV	2018-03-28
Multiple vulnerabilities in the Login Enhancements (Login Block) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected sy…
CVE-2018-0161US	medium6.3OT critical	4.12% (91st)	KEV	2018-03-28
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated,…
CVE-2018-0156US	high7.5OT critical	9.36% (95th)	KEV	2018-03-28
A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected devi…
CVE-2018-0154US	high7.5OT critical	7.07% (94th)	KEV	2018-03-28
A vulnerability in the crypto engine of the Cisco Integrated Services Module for VPN (ISM-VPN) running Cisco IOS Software could allow an unauthenticated, remote attacker to cause a…

+3721 more

references (32)

External citations — patches, advisories, analysis.

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