CVE-2018-19591
In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List
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.
- Record
CVE-2018-19591- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-404
- Updated
- 2026-11-02
EUVDEUVD-2018-11280
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.
- Record
EUVD-2018-11280- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-x2fw-rj3g-6m95
In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname...
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.
- Record
GHSA-x2fw-rj3g-6m95- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20, CWE-404
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2018-19591- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-20, CWE-404
- Updated
- 2026-11-02
OSVBELL-CVE-2018-19591
CVE-2018-19591 does not affect BellSoft software
- Record
BELL-CVE-2018-19591- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-19591- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 6 moreShow less
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2018-19591- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2018-19591- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1776605836 No score
glibc: Fix of 3 CVEs
- CVE-2018-6485: fix integer overflows in memalign and malloc
- CVE-2018-1000001: fix realpath buffer underflow via getcwd
- CVE-2018-19591: fix if_nametoindex descriptor leak
- Record
CLSA-2026-1776605836- Updated
- 2026-11-02
OSVCLSA-2026-1776606103 No score
glibc: Fix of 3 CVEs
- CVE-2018-6485: fix integer overflows in memalign and malloc
- CVE-2018-1000001: fix realpath buffer underflow via getcwd
- CVE-2018-19591: fix if_nametoindex descriptor leak
- Record
CLSA-2026-1776606103- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10792-1 No score
glibc-2.34-1.2 on GA media
These are all security issues fixed in the glibc-2.34-1.2 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10792-1- Updated
- 2026-11-02
OSVUSN-4416-1 No score
glibc vulnerabilities
Florian Weimer discovered that the GNU C Library incorrectly handled certain memory operations. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-12133)
It was discovered that the GNU C Library incorrectly handled certain SSE2-optimized memmove operations. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-18269)
It was discovered that the GNU C Library incorrectly handled certain pathname operations. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-11236)
It was discovered that the GNU C Library incorrectly handled certain AVX-512-optimized mempcpy operations. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-11237)
It was discovered that the GNU C Library incorrectly handled certain hostname loookups. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-19591)
Jakub Wilk discovered that the GNU C Library incorrectly handled certain memalign functions. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-6485)
It was discovered that the GNU C Library incorrectly ignored the LD_PREFER_MAP_32BIT_EXEC environment variable after security transitions. A local attacker could use this issue to bypass ASLR restrictions. (CVE-2019-19126)
It was discovered that the GNU C Library incorrectly handled certain regular expressions. A remote attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-9169)
It was discovered that the GNU C Library incorrectly handled certain bit patterns. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-10029)
It was discovered that the GNU C Library incorrectly handled certain signal trampolines on PowerPC. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-1751)
It was discovered that the GNU C Library incorrectly handled tilde expansion. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2020-1752)
- Record
USN-4416-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
glibcTuxCare:CentOS:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-commonTuxCare:CentOS:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-develTuxCare:CentOS:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-headersTuxCare:CentOS:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-staticTuxCare:CentOS:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-utilsTuxCare:CentOS:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
nscdTuxCare:CentOS:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibcTuxCare:OracleLinux:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-commonTuxCare:OracleLinux:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-develTuxCare:OracleLinux:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
Show 11 moreShow less
| Package | Affected | Fixed |
|---|---|---|
glibc-headersTuxCare:OracleLinux:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-staticTuxCare:OracleLinux:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibc-utilsTuxCare:OracleLinux:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
nscdTuxCare:OracleLinux:6 From an advisory covering 3 CVEs |
before 2.12-2.215.el6.tuxcare.els12 | 2.12-2.215.el6.tuxcare.els12 |
glibcDebian:12 |
before 2.28-1 | 2.28-1 |
glibcDebian:13 |
before 2.28-1 | 2.28-1 |
glibcDebian:14 |
before 2.28-1 | 2.28-1 |
glibcUbuntu:18.04:LTS |
before 2.27-3ubuntu1.2, plus listed versions 2.26-0ubuntu22.26-0ubuntu2.12.27-0ubuntu22.27-0ubuntu32.27-3ubuntu1 |
2.27-3ubuntu1.2 |
glibcUbuntu:16.04:LTS From an advisory covering 11 CVEs |
before 2.23-0ubuntu11.2, plus listed versions 2.21-0ubuntu42.21-0ubuntu52.21-0ubuntu62.23-0ubuntu12.23-0ubuntu2 Show 8 moreShow less2.23-0ubuntu32.23-0ubuntu42.23-0ubuntu52.23-0ubuntu62.23-0ubuntu72.23-0ubuntu92.23-0ubuntu102.23-0ubuntu11 |
2.23-0ubuntu11.2 |
glibcUbuntu:18.04:LTS From an advisory covering 11 CVEs |
before 2.27-3ubuntu1.2, plus listed versions 2.26-0ubuntu22.26-0ubuntu2.12.27-0ubuntu22.27-0ubuntu32.27-3ubuntu1 |
2.27-3ubuntu1.2 |
glibcopenSUSE:Tumbleweed From an advisory covering 34 CVEs |
before 2.34-1.2 | 2.34-1.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-19591 is a high vulnerability (CVSS 7.5) in Gnu Glibc, published December 4, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.53%, the 92nd percentile. Fixed in glibc 2.28-1.
References
sourceware.org/git?p=glibc.git%3Ba=blob_plain%3Bf=NEWS%3Bhb=HEAD
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO7WHN52GFMC5F2I2232GFIPSSXWFV7G
securityfocus.com/bid/106037
security.gentoo.org/glsa/201903-09
Show 63 moreShow less
securitytracker.com/id/1042174
security.netapp.com/advisory/ntap-20190321-0003
usn.ubuntu.com/4416-1
cert-portal.siemens.com/productcert/html/ssa-398330.html
nvd.nist.gov/vuln/detail/CVE-2018-19591
github.com/advisories/GHSA-x2fw-rj3g-6m95
docs.bell-sw.com/security/cves/CVE-2018-19591
errata.tuxcare.com/els_os/centos6els/CLSA-2026-1776605836.html
security-tracker.debian.org/tracker/CVE-2018-19591
ubuntu.com/security/CVE-2018-19591
cve.org/CVERecord?id=CVE-2018-19591
suse.com/security/cve/CVE-2009-5064