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CVE-2009-0031

15
FAUCET Score

CVE-2009-0031 describes a memory leak in the Linux kernel's keyctl_join_session_keyring function, affecting versions 2.6.29-rc2 and earlier. This vulnerability allows a local attacker to cause a denial of service by consuming kernel memory. With a CVSS score of 4.9, it is considered a low-severity local attack requiring no authentication, leading to a complete loss of availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.28.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
2.2.27CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.2.27:*:*:*:*:*:*:*
2.4.36CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.4.36:*:*:*:*:*:*:*
2.4.36.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.4.36.1:*:*:*:*:*:*:*
2.4.36.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.4.36.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

AV:L/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 62nd percentile among its peer group of 3,052 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: MRG for RHEL-5Fixed in: kernel-rt-0:2.6.24.7-108.el5rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-78.0.17.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-128.1.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2009-0031Important

kernel: local denial of service in keyctl_join_session_keyring

Jan 17, 2009

References

git2.kernel.org
lists.opensuse.org / opensuse-security-announce/2009-02/msg00003.html
osvdb.org / 51501
rhn.redhat.com / errata/RHSA-2009-0264.html
secunia.com / advisories/33858
secunia.com / advisories/34252
secunia.com / advisories/34394
secunia.com / advisories/34502
secunia.com / advisories/34762
secunia.com / advisories/34981
secunia.com / advisories/35011
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11386
support.avaya.com / elmodocs2/security/ASA-2009-114.htm
debian.org / security/2009/dsa-1749
debian.org / security/2009/dsa-1787
debian.org / security/2009/dsa-1794
openwall.com / lists/oss-security/2009/01/19/4
redhat.com / support/errata/RHSA-2009-0331.html
redhat.com / support/errata/RHSA-2009-0360.html
ubuntu.com / usn/usn-751-1