Linux Kernel up to 2.6.19-rc1 s390 copy_from_user uninitialized resource

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 2.6.19-rc1 s390. This issue affects the function copy_from_user of the component s390 Handler. Performing a manipulation results in uninitialized resource. This vulnerability is cataloged as CVE-2006-5174. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 2.6.19-rc1 s390 (Operating System). It has been classified as problematic. This affects the function copy_from_user of the component s390 Handler. The manipulation with an unknown input leads to a uninitialized resource vulnerability. CWE is classifying the issue as CWE-908. The product uses or accesses a resource that has not been initialized. This is going to have an impact on confidentiality. The summary by CVE is:

The copy_from_user function in the uaccess code in Linux kernel 2.6 before 2.6.19-rc1, when running on s390, does not properly clear a kernel buffer, which allows local user space programs to read portions of kernel memory by "appending to a file from a bad address," which triggers a fault that prevents the unused memory from being cleared in the kernel buffer.

The bug was discovered 10/04/2006. The weakness was shared 10/06/2006 by Martin Schwidefsky with IBM (Website). The advisory is shared at kernel.org. This vulnerability is uniquely identified as CVE-2006-5174 since 10/05/2006. Access to the local network is required for this attack to succeed. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 22879 (CentOS 3 : kernel (CESA-2006:0710)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115509 (Red Hat Kernel Security Update (RHSA-2007:0014)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (29378), Tenable (22879), SecurityFocus (BID 20379†), OSVDB (29537†) and Secunia (SA22289†). The entries VDB-2551, VDB-2647, VDB-2661 and VDB-2714 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Uninitialized resource
CWE: CWE-908
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 22879
Nessus Name: CentOS 3 : kernel (CESA-2006:0710)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 57711
OpenVAS Name: Debian Security Advisory DSA 1233-1 (kernel-source-2.6.8)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: kernel.org

Timelineinfo

10/04/2006 🔍
10/04/2006 +0 days 🔍
10/05/2006 +1 days 🔍
10/06/2006 +1 days 🔍
10/06/2006 +0 days 🔍
10/06/2006 +0 days 🔍
10/09/2006 +2 days 🔍
10/10/2006 +1 days 🔍
10/19/2006 +9 days 🔍
10/19/2006 +0 days 🔍
10/20/2006 +1 days 🔍
10/30/2006 +10 days 🔍
04/23/2026 +7115 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Researcher: Martin Schwidefsky
Organization: IBM
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-5174 (🔍)
GCVE (CVE): GCVE-0-2006-5174
GCVE (VulDB): GCVE-100-2589

OVAL: 🔍

X-Force: 29378 - Linux kernel copy_from_User information disclosure, Medium Risk
SecurityFocus: 20379 - Linux Kernel S/390 Copy_From_User Local Information Disclosure Vulnerability
Secunia: 22289 - Linux Kernel s390 "copy_from_user" Information Disclosure, Less Critical
OSVDB: 29537 - Linux Kernel on s390 copy_from_user Function Local Memory Disclosure
SecurityTracker: 1017090
Vulnerability Center: 12996 - Linux Kernel Running on S390 allows Memory Read, Low
Vupen: ADV-2006-3938

See also: 🔍

Entryinfo

Created: 10/09/2006 12:01
Updated: 04/23/2026 18:28
Changes: 10/09/2006 12:01 (105), 07/10/2019 10:15 (2), 04/23/2026 18:28 (17)
Complete: 🔍
Cache ID: 216::103

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