Vulnerability · CVE-2023-0687
A vulnerability was found in GNU C Library 2.38.
Published Feb 6, 2023 · catalog updated Oct 14, 2026 · A vulnerability was found
Check if you run it
No confirmed exploitation is on record for CVE-2023-0687. EPSS is 1.09%. Act only if a listed version of A vulnerability was found is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (A vulnerability was found).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Critical9.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 1.09%
- Remediation
- Advisory link
- Affected products
- cpe gnu/glibc
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
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- cpe gnu/glibcversion unspecified
How to fix CVE-2023-0687
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2023-0687. EPSS is 1.09%. Act only if a listed version of A vulnerability was found is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-120: Classic Buffer Overflow. EPSS 1.09%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 6, 2023 · NIST NVD
Detected
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
Oct 14, 2026 · NIST NVD
Updated
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
Sources
- CVE.orgVulnerability recordCVE-2023-0687
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2023-0687
30-day exploitation probability 1.1%
first.org - NIST NVDVulnerability recordCVE-2023-0687
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 thi
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.