---
id: CVE-2023-0687
title: A vulnerability was found in GNU C Library 2.38
summary: >-
  A vulnerability was found in GNU C Library 2.38. It has been declared as
  critical. This vulnerability affects the function __monstartup of the file
  gmon.c of the component Call Graph Monitor. The manipulation leads to buffer
  overflow. It…
severity: medium
cvss: 4.6
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-120
vendor: gnu
product: glibc
affected:
  - glibc < 2.38
patched:
  - glibc 2.38
published: '2023-02-06'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:17:14.240'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-0687'
references:
  - url: >-
      https://patchwork.sourceware.org/project/glibc/patch/20230204114138.5436-1-leo%40yuriev.ru/
    label: cna@vuldb.com
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=29444'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?ctiid.220246'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.220246'
    label: cna@vuldb.com
  - url: >-
      https://patchwork.sourceware.org/project/glibc/patch/20230204114138.5436-1-leo%40yuriev.ru/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=29444'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://vuldb.com/?ctiid.220246'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://vuldb.com/?id.220246'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.01094
epssPercentile: 0.64821
ingestedAt: '2026-10-14T21:57:04.730Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-11-25T15:41:00.523281Z'
---

## Overview

A vulnerability was found in GNU C Library 2.38. It has been declared as critical. This vulnerability affects the function __monstartup of the file gmon.c of the component Call Graph Monitor. The manipulation leads to buffer overflow. It is recommended to apply a patch to fix this issue. VDB-220246 is the identifier assigned to this vulnerability. NOTE: 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.

## Affected

- `glibc < 2.38`

## Remediation

Upgrade past the affected range:

- `glibc 2.38`