CVE-2007-6712

Integer overflow in the hrtimer_forward function (hrtimer.c) in Linux kernel 2.6.21-rc4, when running on 64-bit systems, allows local users to cause a denial of service (infinite loop) via a timer with a large expiry value, which causes the timer to always be expired.

Published: 2008-04-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-6712 is rated Low Risk (30.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.39%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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

Exploit prediction scoring system (EPSS) score for CVE-2007-6712

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 0.04% 0.39% +0.35%
2 2025-03-30 0.06% 0.04% -0.02%
3 2025-03-29 — 0.06% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-6712

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.9 2.0 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 6.9 [email protected]

Weakness enumeration for CVE-2007-6712

OS Trackers for CVE-2007-6712

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2007-6712
ubuntu medium CVE-2007-6712 medium priority: Ubuntu including 5 source packages (linux, linux-source-2.6.15, linux-source-2.6.17, linux-source-2.6.20, linux-source-2.6.22), 30 status rows across 6 suites (dapper, edgy, feisty, gutsy, hardy, upstream): DNE 20, released 7, not-affected 2, ignored 1. https://ubuntu.com/security/CVE-2007-6712

Affected software / configurations for CVE-2007-6712

Vendor Product Version Raw CPE
kernel linux_kernel 2.6.21_rc4 cpe:2.3:a:kernel:linux_kernel:2.6.21_rc4:*:x64:*:*:*:*:*

References for CVE-2007-6712

cvelogic Threat Intelligence