GNU C Library 2.38 Call Graph Monitor gmon.c __monstartup buffer overflow ⚔ [Disputed]

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in GNU C Library 2.38 (Software Library). It has been declared as problematic. This vulnerability affects the function __monstartup of the file gmon.c of the component Call Graph Monitor. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 02/06/2023 by Leo Yuriev as Bug 29444 as confirmed bug report. The advisory is available at This vulnerability was named CVE-2023-0687. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

The real existence of this vulnerability is still doubted at the moment. The inputs that induce this vulnerability are basically addresses of the running application that is built with gmon enabled. It's basically trusted input or input that needs an actual security flaw to be compromised or controlled.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at






  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 4.6
CNA Vector (VulDB): 🔒



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

NVD Base Score: 🔒


Class: Buffer overflow
CWE: CWE-120 / CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfo

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


Recommended: Patch
Status: 🔍

0-Day Time: 🔒



02/06/2023 Advisory disclosed
02/06/2023 +0 days CVE reserved
02/06/2023 +0 days VulDB entry created
03/05/2023 +27 days VulDB last update



Advisory: Bug 29444
Researcher: Leo Yuriev
Status: Confirmed
Disputed: 🔍

CVE: CVE-2023-0687 (🔒)


Created: 02/06/2023 08:01 PM
Updated: 03/05/2023 01:16 PM
Changes: 02/06/2023 08:01 PM (43), 02/06/2023 08:02 PM (2), 02/17/2023 07:27 PM (1), 02/17/2023 07:34 PM (12), 03/05/2023 01:03 PM (2), 03/05/2023 01:10 PM (28), 03/05/2023 01:16 PM (1)
Complete: 🔍
Submitter: erthink
Committer: siddhesh


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