# CVE-2023-0687: Memory corruption in C Library

> A buffer overflow in the gmon component of the GNU C Library could allow code execution, though exploitation requires specific profiling configurations and is considered doubtful.

- **Severity:** Medium 4.6 (`CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Feb 2023
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-5r4p-4pqv-gqhw, MINI-4mhv-fqj9-c2qq, OESA-2023-1131, SUSE-SU-2023:1718-1, SUSE-SU-2023:1718-2

## What is CVE-2023-0687?

CVE-2023-0687 is a medium-severity memory corruption vulnerability in Gnu Glibc, published on 6 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2023-0687?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `glibc` | SUSE:Enterprise Storage 7.1 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Micro 5.1 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Micro 5.2 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Micro 5.3 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Micro 5.4 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Module for Development Tools 15 SP4 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Real Time 15 SP3 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Manager Proxy 4.2 | All versions | 2.31-150300.46.1 |
| `glibc` | SUSE:Manager Server 4.2 | All versions | 2.31-150300.46.1 |
| `glibc` | openSUSE:Leap 15.4 | All versions | 2.31-150300.46.1 |
| `glibc` | openSUSE:Leap Micro 5.3 | All versions | 2.31-150300.46.1 |

Products: Gnu Glibc.

## How do I fix CVE-2023-0687?

Apply the vendor's patch.

## Is CVE-2023-0687 being exploited?

There is no known exploitation of CVE-2023-0687 in the wild and no public exploit code.

## Other vulnerabilities in Gnu Glibc

- [CVE-2026-5450](https://insights.sbomify.com/CVE-2026-5450/): scanf %mc off-by-one heap buffer overflow (critical 9.8)
- [CVE-2023-25139](https://insights.sbomify.com/CVE-2023-25139/): Memory corruption in n/a (critical 9.8)
- [CVE-1999-0199](https://insights.sbomify.com/CVE-1999-0199/): Other in n/a (critical 9.8)
- [CVE-2019-1010022](https://insights.sbomify.com/CVE-2019-1010022/): Security feature bypass in glibc (critical 9.8)
- [CVE-2005-3590](https://insights.sbomify.com/CVE-2005-3590/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0687 and fix it if it is affected.

What it is: CVE-2023-0687 is a medium-severity memory corruption vulnerability in Gnu Glibc, published on 6 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-0687 in the wild and no public exploit code.

Affected product: Gnu Glibc. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-0687/ (Markdown: https://insights.sbomify.com/CVE-2023-0687/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0687
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0687
- OSV: https://osv.dev/vulnerability/CVE-2023-0687

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0687/
Summaries are generated and may contain mistakes; the official description above is the record.