CVE-2009-4020
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote...
7.8 High
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
Exploit likelihood
4.76%Up 1.0 points since Feb 4, 2022
What each source reports
NVD Score used
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
- Record
CVE-2009-4020- CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
- Record
CVE-2009-4020- Updated
- 2026-11-02
EUVDEUVD-2009-3991 No score
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
- Record
EUVD-2009-3991- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qwp9-6w2r-7cq2 No score
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote...
Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.
- Record
GHSA-qwp9-6w2r-7cq2- Weakness
- CWE-119
- 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 |
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 |
Show 71 moreShow less
| Package | Affected | Fixed |
|---|---|---|
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 |
kernelRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-debuginfoRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-develRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-docRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugememRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugemem-develRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmpRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmp-develRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smpRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smp-develRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenURed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenU-develRed Hat:enterprise_linux:4::as From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernelRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-debuginfoRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-develRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-docRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugememRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugemem-develRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmpRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmp-develRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smpRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smp-develRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenURed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenU-develRed Hat:enterprise_linux:4::desktop From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernelRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-debuginfoRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-develRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-docRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugememRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugemem-develRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmpRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmp-develRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smpRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smp-develRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenURed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenU-develRed Hat:enterprise_linux:4::es From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernelRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-debuginfoRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-develRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-docRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugememRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-hugemem-develRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmpRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-largesmp-develRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smpRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-smp-develRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenURed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
kernel-xenU-develRed Hat:enterprise_linux:4::ws From an advisory covering 5 CVEs |
before 0:2.6.9-89.0.20.EL | 0:2.6.9-89.0.20.EL |
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-2009-4020 is a high vulnerability (CVSS 7.8) in Linux Kernel, published December 4, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.76%, the 91st percentile. No source names a fixed version.
References
marc.info?l=linux-mm-commits&m=125987755823047&w=2
secunia.com/advisories/38276
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10091
support.avaya.com/css/P8/documents/100073666
openwall.com/lists/oss-security/2009/12/04/1
Show 78 moreShow less
bugzilla.redhat.com/show_bug.cgi?id=540736
userweb.kernel.org/~akpm/mmotm/broken-out/hfs-fix-a-potential-buffer-overflow.patch
lists.opensuse.org/opensuse-security-announce/2010-03/msg00007.html
novell.com/linux/security/advisories/2010_23_kernel.html
rhn.redhat.com/errata/RHSA-2010-0095.html
debian.org/security/2010/dsa-2005
nvd.nist.gov/vuln/detail/CVE-2009-4020
access.redhat.com/errata/RHSA-2010:0046
github.com/advisories/GHSA-qwp9-6w2r-7cq2
kbase.redhat.com/faq/docs/DOC-20536
security.access.redhat.com/data/csaf/v2/advisories/2010/rhsa-2010_0046.json
cve.org/CVERecord?id=CVE-2006-6304