Linux Kernel 2.6.x __block_prepare_write memory corruption

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

Summaryinfo

A vulnerability was found in Linux Kernel 2.6.x and classified as problematic. This affects the function __block_prepare_write. Executing a manipulation can lead to memory corruption. This vulnerability is tracked as CVE-2006-4813. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel 2.6.x (Operating System). It has been declared as problematic. This vulnerability affects the function __block_prepare_write. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality. CVE summarizes:

The __block_prepare_write function in fs/buffer.c for Linux kernel 2.6.x before 2.6.13 does not properly clear buffers during certain error conditions, which allows local users to read portions of files that have been unlinked.

The bug was discovered 09/21/2006. The weakness was disclosed 10/12/2006 (Website). The advisory is available at lists.suse.com. This vulnerability was named CVE-2006-4813 since 09/15/2006. The exploitation appears to be easy. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 21 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 24628 (Mandrake Linux Security Advisory : kernel (MDKSA-2007:012)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva 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. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (33656), Tenable (24628), SecurityFocus (BID 21522†), OSVDB (31376†) and Secunia (SA23474†). The entries VDB-2551, VDB-2589, VDB-2590 and VDB-2647 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 24628
Nessus Name: Mandrake Linux Security Advisory : kernel (MDKSA-2007:012)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

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: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

09/15/2006 🔍
09/21/2006 +6 days 🔍
09/21/2006 +0 days 🔍
10/12/2006 +21 days 🔍
10/12/2006 +0 days 🔍
10/12/2006 +0 days 🔍
12/18/2006 +67 days 🔍
01/12/2007 +25 days 🔍
01/12/2007 +0 days 🔍
02/18/2007 +36 days 🔍
03/12/2015 +2944 days 🔍
04/24/2026 +4061 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: lists.suse.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-4813 (🔍)
GCVE (CVE): GCVE-0-2006-4813
GCVE (VulDB): GCVE-100-32722

OVAL: 🔍

X-Force: 33656
SecurityFocus: 21522 - Linux Kernel FS/Buffer.C Local Information Disclosure Vulnerability
Secunia: 23474
OSVDB: 31376 - Linux Kernel fs/buffer.c __block_prepare_write Function Unlinked File Disclosure
Vulnerability Center: 13369 - Linux Kernel buffer\x27s allows to Read Portions of Unlinked Files, Low

See also: 🔍

Entryinfo

Created: 03/12/2015 22:21
Updated: 04/24/2026 08:35
Changes: 03/12/2015 22:21 (80), 07/12/2019 08:25 (5), 04/24/2026 08:35 (19)
Complete: 🔍
Cache ID: 216::103

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