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

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

CVSS v3.0

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

CVSS v2.0

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, 92th percentile

Published

2018-12-04

Updated

2025-12-03

Proof-of-concept exploits (1)

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

References

• CVE Record
• NVD entry

Related

• CVE-2018-19588
• CVE-2018-19592
• CVE-2018-19585
• CVE-2018-19600
• CVE-2018-19584
• CVE-2018-19607