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Vulnerability record · CVE-2023-25139 · published 3 February 2023

CVE-2023-25139: Gnu glibc out-of-bounds write vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 1.4% · top 28.2% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2023/02/10/1
https://security.netapp.com/advisory/ntap-20230302-0010/
https://sourceware.org/bugzilla/show_bug.cgi?id=30068 ExploitIssue TrackingThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/02/10/1
https://security.netapp.com/advisory/ntap-20230302-0010/
https://sourceware.org/bugzilla/show_bug.cgi?id=30068 ExploitIssue TrackingThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-25139), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.