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CVE-2007-5966

18
FAUCET Score

CVE-2007-5966 is an integer overflow vulnerability in the hrtimer_start function of the Linux kernel, affecting versions prior to 2.6.23.10. This flaw allows local users to achieve arbitrary code execution or trigger a denial of service (system panic) by providing a large relative timeout value. With a CVSS score of 7.2, it is considered high severity, requiring local access with low attack complexity, and potentially leading to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, indicating a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
2.6.23CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.23:*:*:*:*:*:*:*
2.6.23CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.23:rc1:*:*:*:*:*:*
2.6.23CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.23:rc2:*:*:*:*:*:*
2.6.23.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.23.1:*:*:*:*:*:*:*
2.6.23.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.23.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 58th percentile among its peer group of 3,241 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 0.5 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: MRG for RHEL-5Fixed in: kernel-rt-0:2.6.24.7-74.el5rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-128.4.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.2 Z StreamFixed in: kernel-0:2.6.18-92.1.35.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.3.Z - Server OnlyFixed in: kernel-0:2.6.18-128.4.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2007-5966Important

kernel: non-root can trigger cpu_idle soft lockup

Dec 7, 2007

References

kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.23.10
lists.opensuse.org / opensuse-security-announce/2008-02/msg00002.html
secunia.com / advisories/28088
secunia.com / advisories/28105
Vendor Advisory
secunia.com / advisories/28141
secunia.com / advisories/28706
secunia.com / advisories/28806
secunia.com / advisories/31628
secunia.com / advisories/36131
secunia.com / advisories/37471
issues.rpath.com / browse/RPL-2038
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10774
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8125
debian.org / security/2007/dsa-1436
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2008-0585.html
redhat.com / support/errata/RHSA-2009-1193.html
securityfocus.com / archive/1/485282/100/0/threaded
securityfocus.com / archive/1/507985/100/0/threaded
securityfocus.com / bid/26880
Patch
ubuntu.com / usn/usn-574-1
vmware.com / security/advisories/VMSA-2009-0016.html
vupen.com / english/advisories/2007/4225
vupen.com / english/advisories/2009/3316