Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2018-19591

CVE-2018-19591HIGH

n/a n/a — In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocatio…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0553   92.7     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Nov 26  Reserved by mitre
  Dec 4   Published (CNA: mitre)
  Oct 14  EXPLOIT PUBLISHED — CVE-2018-19591. Public exploit reference added.

CWE-20, CWE-404 · CNA: mitre · CVSS v3.1 · 12 references · NVD status: Modified

Description

In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 26, 2018	Reserved	Reserved by mitre
December 4, 2018	Published	Published (CNA: mitre)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2018-19591. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-20 · CWE-404

References (12)

http://www.securityfocus.com/bid/106037 [Third Party Advisory, VDB Entry]
http://www.securitytracker.com/id/1042174 [Third Party Advisory, VDB Entry]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO7WHN52GFMC5F2I2232GFIPSSXWFV7G/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M52KE4YR3GNMHQUOS3DKAGZD5TQ5D5UH/
https://security.gentoo.org/glsa/201903-09 [Third Party Advisory]
https://security.gentoo.org/glsa/201908-06
https://security.netapp.com/advisory/ntap-20190321-0003/
https://sourceware.org/bugzilla/show_bug.cgi?id=23927 [Exploit, Issue Tracking, Third Party Advisory]
https://sourceware.org/git/?p=glibc.git%3Ba=blob_plain%3Bf=NEWS%3Bhb=HEAD
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commitdiff%3Bh=d527c860f5a3f0ed687bd03f0cb464612dc23408
https://usn.ubuntu.com/4416-1/

Authoritative record: CVE-2018-19591 at cve.org

Weaknesses: CWE-20 · CWE-404

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2018-19591 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.