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CVE-2008-4307

16
FAUCET Score

CVE-2008-4307 describes a race condition in the Linux kernel's NFS file locking mechanism (do_setlk function in fs/nfs/file.c) affecting versions prior to 2.6.26. This flaw allows a local attacker to trigger a denial of service (system crash) by exploiting a race between fcntl and close operations during an interrupted RPC call, leading to a stray POSIX lock. The vulnerability has a CVSS score of 4.0, indicating low attack complexity and requiring local access, with the primary impact being system availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.25.9CPE 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

4.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
1.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 12th percentile among its peer group of 1,595 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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-0:2.6.24.7-111.el5rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-78.0.22.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-128.1.10.el5
View patch

Vendor Advisories (1)

redhatCVE-2008-4307Important

Kernel BUG() in locks_remove_flock

Oct 30, 2008

References

git.kernel.org
openwall.com / lists/oss-security/2009/01/13/1
rhn.redhat.com / errata/RHSA-2009-0459.html
rhn.redhat.com / errata/RHSA-2009-0473.html
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/34917
Vendor Advisory
secunia.com / advisories/34962
Vendor Advisory
secunia.com / advisories/34981
Vendor Advisory
secunia.com / advisories/35011
Vendor Advisory
secunia.com / advisories/35015
Vendor Advisory
secunia.com / advisories/37471
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7728
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9233
debian.org / security/2009/dsa-1787
debian.org / security/2009/dsa-1794
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.26
Vendor Advisory
redhat.com / support/errata/RHSA-2009-0451.html
securityfocus.com / archive/1/507985/100/0/threaded
ubuntu.com / usn/usn-751-1
vmware.com / security/advisories/VMSA-2009-0016.html
vupen.com / english/advisories/2009/3316