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.

CVSS v3.1 CNA

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

CVSS v3.0 NVD

7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

5.53% chance of exploitation in the next 30 days, 93rd percentile

Published

2018-12-04

Updated

2026-10-14

Proof-of-concept exploits (1)

• https://sourceware.org/bugzilla/show_bug.cgi?id=23927

Security advisories

• http://www.securityfocus.com/bid/106037
• http://www.securitytracker.com/id/1042174
• https://security.gentoo.org/glsa/201903-09
• https://usn.ubuntu.com/4416-1

References

• CVE Record
• NVD entry