CVE-2009-4021
The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2...
4.9 Medium
The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.
Exploit likelihood
0.41%Down 1.1 points since Feb 4, 2022
What each source reports
NVD Score used
The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.
- Record
CVE-2009-4021- CVSS 2.0
- 4.9 Medium
AV:L/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.
- Record
CVE-2009-4021- Updated
- 2026-11-02
EUVDEUVD-2009-3992 No score
The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.
- Record
EUVD-2009-3992- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fc2m-v5px-4xvc No score
The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2...
The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.
- Record
GHSA-fc2m-v5px-4xvc- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linux-2.6Debian:4.0 From an advisory covering 10 CVEs |
before 2.6.18.dfsg.1-26etch2, plus listed versions 2.6.18.dfsg.1-122.6.18.dfsg.1-12etch12.6.18.dfsg.1-12etch22.6.18.dfsg.1-132.6.18.dfsg.1-13etch1 Show 33 moreShow less2.6.18.dfsg.1-13etch22.6.18.dfsg.1-13etch32.6.18.dfsg.1-13etch42.6.18.dfsg.1-13etch52.6.18.dfsg.1-13etch62.6.18.dfsg.1-13lenny12.6.18.dfsg.1-142.6.18.dfsg.1-152.6.18.dfsg.1-162.6.18.dfsg.1-172.6.18.dfsg.1-17etch12.6.18.dfsg.1-182.6.18.dfsg.1-18etch12.6.18.dfsg.1-18etch32.6.18.dfsg.1-18etch42.6.18.dfsg.1-18etch52.6.18.dfsg.1-18etch62.6.18.dfsg.1-192.6.18.dfsg.1-202.6.18.dfsg.1-212.6.18.dfsg.1-222.6.18.dfsg.1-22etch12.6.18.dfsg.1-22etch22.6.18.dfsg.1-22etch32.6.18.dfsg.1-232.6.18.dfsg.1-23etch12.6.18.dfsg.1-242.6.18.dfsg.1-24etch12.6.18.dfsg.1-24etch22.6.18.dfsg.1-24etch32.6.18.dfsg.1-24etch42.6.18.dfsg.1-262.6.18.dfsg.1-26etch1 |
2.6.18.dfsg.1-26etch2 |
linux-2.6.24Debian:4.0 From an advisory covering 18 CVEs |
before 2.6.24-6~etchnhalf.9etch3, plus listed versions 2.6.24-5~etchnhalf.12.6.24-6~etchnhalf.12.6.24-6~etchnhalf.22.6.24-6~etchnhalf.32.6.24-6~etchnhalf.4 Show 10 moreShow less2.6.24-6~etchnhalf.52.6.24-6~etchnhalf.62.6.24-6~etchnhalf.72.6.24-6~etchnhalf.82.6.24-6~etchnhalf.8etch12.6.24-6~etchnhalf.8etch22.6.24-6~etchnhalf.8etch32.6.24-6~etchnhalf.92.6.24-6~etchnhalf.9etch12.6.24-6~etchnhalf.9etch2 |
2.6.24-6~etchnhalf.9etch3 |
kernel-rtRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-debugRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-debug-debuginfoRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-debug-develRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-debuginfoRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-debuginfo-commonRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-develRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-docRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
Show 37 moreShow less
| Package | Affected | Fixed |
|---|---|---|
kernel-rt-traceRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-trace-debuginfoRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-trace-develRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-vanillaRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-vanilla-debuginfoRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernel-rt-vanilla-develRed Hat:enterprise_mrg:1::el5 From an advisory covering 5 CVEs |
before 0:2.6.24.7-146.el5rt | 0:2.6.24.7-146.el5rt |
kernelRed 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-PAERed 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-debuginfoRed 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-develRed 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-debugRed 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-debuginfoRed 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-develRed 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-debuginfoRed 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-commonRed 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-develRed 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-docRed 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-xenRed 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-debuginfoRed 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-develRed 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 |
kernelRed 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-PAERed 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-debuginfoRed 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-develRed 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-debugRed 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-debuginfoRed 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-develRed 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-debuginfoRed 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-commonRed 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-develRed 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-docRed 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-kdumpRed 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-debuginfoRed 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-develRed 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-xenRed 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-debuginfoRed 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-develRed 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 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-4021 is a medium vulnerability (CVSS 4.9) in Linux Kernel, published November 25, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.
References
git.kernel.org?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f60311d5f7670d9539b424e4ed8b5c0872fc9e83
kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc7
lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html
securityfocus.com/bid/37069
openwall.com/lists/oss-security/2009/11/19/1
Show 93 moreShow less
exchange.xforce.ibmcloud.com/vulnerabilities/54358
support.avaya.com/css/P8/documents/100073666
secunia.com/advisories/37909
bugzilla.redhat.com/show_bug.cgi?id=538734
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6955
rhn.redhat.com/errata/RHSA-2010-0095.html
debian.org/security/2010/dsa-2005
redhat.com/support/errata/RHSA-2010-0041.html
nvd.nist.gov/vuln/detail/CVE-2009-4021
github.com/advisories/GHSA-fc2m-v5px-4xvc
access.redhat.com/errata/RHSA-2010:0041
security.access.redhat.com/data/csaf/v2/advisories/2010/rhsa-2010_0041.json
cve.org/CVERecord?id=CVE-2009-3080
kbase.redhat.com/faq/docs/DOC-20536