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Vulnerabilities

Vulnerability · CVE-2023-25139

sprintf in the GNU C Library (glibc) 2.37 has a buffer overflow (out-of-bounds write) in some situations with a correct buffer size.

Published Feb 3, 2023 · catalog updated Oct 14, 2026 · sprintf in the GNU

Check if you run it

No confirmed exploitation is on record for CVE-2023-25139. EPSS is 1.50%. Act only if a listed version of sprintf in the GNU is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (sprintf in the GNU).
  • 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
1.50%
Remediation
Advisory link
Affected products
cpe gnu/glibc

sprintf in the GNU C Library (glibc) 2.37 has a buffer overflow (out-of-bounds write) in some situations with a correct buffer size. This is unrelated to CWE-676. It may write beyond the bounds of the destination buffer when attempting to write a padded, thousands-separated string representation of a number, if the buffer is allocated the exact size required to represent that number as a string. For example, 1,234,567 (with padding to 13) overflows by two bytes.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe gnu/glibc2.37

How to fix CVE-2023-25139

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-2023-25139. EPSS is 1.50%. Act only if a listed version of sprintf in the GNU is installed.

Which versions are affected?

Compare what you have installed with 2.37. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-787: Out-of-bounds Write. EPSS 1.50%. 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.

  1. Feb 3, 2023 · NIST NVD

    Detected

    sprintf in the GNU C Library (glibc) 2.37 has a buffer overflow (out-of-bounds write) in some situations with a correct buffer size. This is unrelated to CWE-676. It may write beyond the bounds of the destination buffer when attempting to write a padded, thousands-separated string representation of a number, if the buffer is allocated the exact size required to represent that number as a string. F

  2. Oct 14, 2026 · NIST NVD

    Updated

    sprintf in the GNU C Library (glibc) 2.37 has a buffer overflow (out-of-bounds write) in some situations with a correct buffer size. This is unrelated to CWE-676. It may write beyond the bounds of the destination buffer when attempting to write a padded, thousands-separated string representation of a number, if the buffer is allocated the exact size required to represent that number as a string. F

Sources

  • CVE.orgVulnerability recordCVE-2023-25139

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-25139

    30-day exploitation probability 1.5%

    first.org
  • NIST NVDVulnerability recordCVE-2023-25139

    sprintf in the GNU C Library (glibc) 2.37 has a buffer overflow (out-of-bounds write) in some situations with a correct buffer size. This is unrelated to CWE-676. It may write beyond the bounds of the destination buffer when attempting to write a padded, thousands-separated strin

    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.