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CVE-2018-19591

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.

Severity
High 7.5
Published
4 Dec 2018
Last changed
14 Oct 2026
Added to UpHeron
1 Nov 2026
Exploit chance
5.5% in the next 30 daysHigher than 92% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Improper input validation (CWE-20)Improper resource shutdown (CWE-404)
Attack
Over the network · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
GNU C LibraryServers and applications · cpe:a:gnu:glibc
  • Every version up to 2.28

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-19591
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-19591