CVE-2009-3547

Exp

Multiple race conditions in fs/pipe.c in the Linux kernel before 2.6.32-rc6 allow local users to cause a denial of service (NULL pointer dereference and system crash) or gain privileges by attempting to open an anonymous pipe via a /proc/*/fd/ pathname.

Published: 2009-11-04 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-3547 is rated High Exploit Risk (77.8/100): CVSS High severity, with high exploitation likelihood (EPSS 4.93%, 91th percentile). 7 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.92% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-3547

EDB-ID Source Kind Published Link
40812 exploit_db edb 2013-12-16 Exploit-DB ↗
10018 exploit_db edb 2009-11-12 Exploit-DB ↗
9844 exploit_db edb 2009-11-05 Exploit-DB ↗
33322 exploit_db edb 2009-11-03 Exploit-DB ↗
33321 exploit_db edb 2009-11-03 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-3547

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.01% 4.93% +2.92%
2 2026-06-08 3.15% 2.01% -1.14%
3 2026-04-08 — 3.15% —

Full EPSS history (28 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-3547

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.0 3.1 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.0 5.9 [email protected]
6.9 2.0 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 10.0 [email protected]

Weakness enumeration for CVE-2009-3547

OS Trackers for CVE-2009-3547

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2009-3547
ubuntu medium CVE-2009-3547 medium priority: Ubuntu including 2 source packages (linux, linux-source-2.6.15), 12 status rows across 6 suites (dapper, hardy, intrepid, jaunty, karmic, upstream): released 7, DNE 5. https://ubuntu.com/security/CVE-2009-3547

Affected software / configurations for CVE-2009-3547

Vendor Product Version Raw CPE
linux linux_kernel <= 2.6.31.14 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 2.6.32 cpe:2.3:o:linux:linux_kernel:2.6.32:-:*:*:*:*:*:*
linux linux_kernel 2.6.32 cpe:2.3:o:linux:linux_kernel:2.6.32:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.32 cpe:2.3:o:linux:linux_kernel:2.6.32:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.32 cpe:2.3:o:linux:linux_kernel:2.6.32:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.32 cpe:2.3:o:linux:linux_kernel:2.6.32:rc4:*:*:*:*:*:*
linux linux_kernel 2.6.32 cpe:2.3:o:linux:linux_kernel:2.6.32:rc5:*:*:*:*:*:*
novell linux_desktop 9 cpe:2.3:o:novell:linux_desktop:9:*:*:*:*:*:*:*
opensuse opensuse 11.0 cpe:2.3:o:opensuse:opensuse:11.0:*:*:*:*:*:*:*
opensuse opensuse 11.2 cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:*
suse suse_linux_enterprise_desktop 10 cpe:2.3:o:suse:suse_linux_enterprise_desktop:10:sp2:*:*:*:*:*:*
suse suse_linux_enterprise_server 10 cpe:2.3:o:suse:suse_linux_enterprise_server:10:sp2:*:*:*:*:*:*
canonical ubuntu_linux 6.06 cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*
canonical ubuntu_linux 8.04 cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:*:*:*:*
canonical ubuntu_linux 8.10 cpe:2.3:o:canonical:ubuntu_linux:8.10:*:*:*:*:*:*:*
canonical ubuntu_linux 9.04 cpe:2.3:o:canonical:ubuntu_linux:9.04:*:*:*:*:*:*:*
canonical ubuntu_linux 9.10 cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:*
fedoraproject fedora 10 cpe:2.3:o:fedoraproject:fedora:10:*:*:*:*:*:*:*
vmware vma 4.0 cpe:2.3:a:vmware:vma:4.0:*:*:*:*:*:*:*
vmware esx 4.0 cpe:2.3:o:vmware:esx:4.0:*:*:*:*:*:*:*
redhat mrg_realtime 1.0 cpe:2.3:a:redhat:mrg_realtime:1.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 3.0 cpe:2.3:o:redhat:enterprise_linux_desktop:3.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 4.0 cpe:2.3:o:redhat:enterprise_linux_desktop:4.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 5.0 cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
redhat enterprise_linux_eus 4.8 cpe:2.3:o:redhat:enterprise_linux_eus:4.8:*:*:*:*:*:*:*
redhat enterprise_linux_eus 5.4 cpe:2.3:o:redhat:enterprise_linux_eus:5.4:*:*:*:*:*:*:*
redhat enterprise_linux_server 3.0 cpe:2.3:o:redhat:enterprise_linux_server:3.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 4.0 cpe:2.3:o:redhat:enterprise_linux_server:4.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 5.0 cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 3.0 cpe:2.3:o:redhat:enterprise_linux_workstation:3.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 4.0 cpe:2.3:o:redhat:enterprise_linux_workstation:4.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 5.0 cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*

References for CVE-2009-3547

URL Tags
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ad3960243e55320d74195fb85c975e0a8cc4466c Broken Link
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00007.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html Broken Link Mailing List Third Party Advisory
http://lists.vmware.com/pipermail/security-announce/2010/000082.html Mailing List Third Party Advisory
http://lkml.org/lkml/2009/10/14/184 Exploit Mailing List
http://lkml.org/lkml/2009/10/21/42 Mailing List Patch
http://marc.info/?l=oss-security&m=125724568017045&w=2 Mailing List Third Party Advisory
http://secunia.com/advisories/37351 Broken Link
http://secunia.com/advisories/38017 Broken Link
http://secunia.com/advisories/38794 Broken Link
http://secunia.com/advisories/38834 Broken Link
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc6 Broken Link
http://www.mandriva.com/security/advisories?name=MDVSA-2009:329 Broken Link
http://www.redhat.com/support/errata/RHSA-2009-1672.html Broken Link
http://www.securityfocus.com/archive/1/512019/100/0/threaded Broken Link Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/36901 Broken Link Exploit Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/usn-864-1 Third Party Advisory
http://www.vupen.com/english/advisories/2010/0528 Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=530490 Issue Tracking Patch Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11513 Broken Link Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7608 Broken Link Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9327 Broken Link Third Party Advisory
https://rhn.redhat.com/errata/RHSA-2009-1540.html Third Party Advisory
https://rhn.redhat.com/errata/RHSA-2009-1541.html Third Party Advisory
https://rhn.redhat.com/errata/RHSA-2009-1548.html Third Party Advisory
https://rhn.redhat.com/errata/RHSA-2009-1550.html Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00190.html Mailing List
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