CVE-2007-3731
Summary
| CVE | CVE-2007-3731 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2007-09-17 17:17:00 UTC |
| Updated | 2026-04-23 00:35:47 UTC |
| Description | The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function. |
Risk And Classification
CVSS v2.0 Breakdown
Access Vector
LocalAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
CompleteAV:L/AC:L/Au:N/C:N/I:N/A:C
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | 2.6.20 | All | All | All |
| Operating System | Linux | Linux Kernel | 2.6.21 | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| About Secunia Research | Flexera | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| Debian -- Security Information -- DSA-1378-2 linux-2.6 | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | |
| Bug 248324 – CVE-2007-3731 NULL pointer dereference triggered by ptrace | af854a3a-2127-422b-91ae-364da2661108 | bugzilla.redhat.com | Patch |
| osvdb.org/37286 | af854a3a-2127-422b-91ae-364da2661108 | osvdb.org | |
| Linux Kernel PTrace NULL Pointer Dereference Local Denial Of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Debian update for kernel - Advisories - Secunia | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| rPath update for kernel - Advisories - Secunia | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| rhn.redhat.com | Red Hat Support | af854a3a-2127-422b-91ae-364da2661108 | www.redhat.com | |
| kernel/git/torvalds/linux.git - Linux kernel source tree | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | |
| Ubuntu update for kernel - Advisories - Secunia | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| SecurityFocus | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | |
| Repository / Oval Repository | af854a3a-2127-422b-91ae-364da2661108 | oval.cisecurity.org | |
| Linux Kernel ptrace Single Step "CS" Null Pointer Dereference - Advisories - Secunia | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| issues.rpath.com/browse/RPL-2304 | af854a3a-2127-422b-91ae-364da2661108 | issues.rpath.com | |
| Advisories:rPSA-2008-0094 - rPath Wiki | af854a3a-2127-422b-91ae-364da2661108 | wiki.rpath.com | |
| 8765 – NULL pointer dereference triggered by ptrace | af854a3a-2127-422b-91ae-364da2661108 | bugzilla.kernel.org | Exploit |
| USN-518-1: Linux kernel vulnerabilities | Ubuntu | af854a3a-2127-422b-91ae-364da2661108 | www.ubuntu.com | |
| kernel/git/torvalds/linux.git - Linux kernel source tree | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | |
| kernel/git/torvalds/linux.git - Linux kernel source tree | MITRE | git.kernel.org | |
| kernel/git/torvalds/linux.git - Linux kernel source tree | MITRE | git.kernel.org | |
| Red Hat Customer Portal | MITRE | access.redhat.com | |
| access.redhat.com | CVE-2007-3731 | MITRE | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
| Organization | Published | Contributor | Statement |
|---|---|---|---|
| Red Hat | 2007-10-18 | Mark J Cox | This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, or 4. |
There are currently no legacy QID mappings associated with this CVE.