CVE-2023-25139

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-02-03 · updated 2026-10-14
Weakness: CWE-787

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.

Affected products

GNU C Library (glibc): 2.37

References

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
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
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Get alerted when CVE-2023-25139 or the next vulnerability affects your stack