CVE•Published 2023-02-03•Modified 2026-10-14•1 article on news•6 live references•NVD data
CVE-2023-25139Gnu · Glibc
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
72
Exploit Prediction Scoring System · top 28% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2023-02-03
Modified 2026-10-14
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2023-25139Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Gnu Glibc" version:"2.37"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Glibc"HTTP body or banner mentions "Glibc" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2023-25139Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2023-25139Censys host search filtered to this CVE id.
grep.app
CVE-2023-25139Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2023-25139GitHub code search for direct mentions.
Google dork
"CVE-2023-25139" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (2)
CVE-2023-251392 repos