Linux Kernel 2.6.16 signal.c __group_complete_signal memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as very critical has been found in Linux Kernel 2.6.16 (Operating System). This affects the function __group_complete_signal of the file signal.c. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The __group_complete_signal function in the RCU signal handling (signal.c) in Linux kernel 2.6.16, and possibly other versions, has unknown impact and attack vectors related to improper use of BUG_ON.

The issue has been introduced in 03/20/2006. The weakness was shared 04/12/2006 (Website). It is possible to read the advisory at This vulnerability is uniquely identified as CVE-2006-1523. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/08/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 23 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 22645 (Debian DSA-1103-1 : kernel-source-2.6.8 - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (30228) and Tenable (22645). The entries 1855, 1854 and 2070 are related to this item.







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 10.0

VulDB Base Score: 10.0
VulDB Temp Score: 10.0
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Current Price Estimation: 🔍


Nessus ID: 22645
Nessus Name: Debian DSA-1103-1 : kernel-source-2.6.8 - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 57028
OpenVAS Name: Debian Security Advisory DSA 1103-1 (kernel-source-2.6.8)
OpenVAS File: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: no mitigation known
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0-Day Time: 🔍


03/20/2006 🔍
03/30/2006 +9 days 🔍
04/11/2006 +12 days 🔍
04/12/2006 +1 days 🔍
04/12/2006 +0 days 🔍
04/21/2006 +9 days 🔍
11/26/2009 +1315 days 🔍
03/12/2015 +1932 days 🔍
07/08/2021 +2310 days 🔍



Status: Not defined
Confirmation: 🔍

CVE: CVE-2006-1523 (🔍)
X-Force: 30228
Vulnerability Center: 24187 - Linux Kernel 2.6.16 RCU signal handling Local Unspecified Vulnerability, Critical
SecurityFocus: 17640 - Linux Kernel RCU signal handling __group_complete_signal Function Unspecified Vulnerability

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Created: 03/12/2015 12:19 PM
Updated: 07/08/2021 06:23 PM
Changes: 03/12/2015 12:19 PM (61), 02/17/2017 11:28 AM (8), 07/08/2021 06:15 PM (3), 07/08/2021 06:23 PM (1)
Complete: 🔍


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