Description
In the GNU C Library (aka glibc or libc6) through 2.28, the getaddrinfo function would successfully parse a string that contained an IPv4 address followed by whitespace and arbitrary characters, which could lead applications to incorrectly assume that it had parsed a valid string, without the possibility of embedded HTTP headers or other potentially dangerous substrings.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glibc | 2.28-6 | — |
| Debian 13 | glibc | 2.28-6 | — |
| Debian 12 | glibc | 2.28-6 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | glibc | No fix yet | — |
| Ubuntu Pro 16.04 LTS | glibc | No fix yet | — |
| Ubuntu Pro 14.04 LTS | eglibc | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | nscd +212 | 2.28-72.el8 | RHSA-2019:3513 |
| RHEL 7 | nscd +7 | 2.17-292.el7 | RHSA-2019:2118 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | glibc | 2.26-13.19.1 | SUSE-SU-2019:0903-1 |
| SLES 12 SP4 | glibc | 2.22-100.8.1 | SUSE-SU-2019:1102-1 |
| SLES 12 SP3 | glibc | 2.22-133.1 | SUSE-SU-2023:0015-1 |
| SLES 12 SP2 | glibc | 2.22-133.1 | SUSE-SU-2023:0015-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | glibc | 2.22-100.8.1 | SUSE-SU-2019:1102-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.34-1.2 | openSUSE-SU-2024:10792-1 |
| openSUSE Leap 15.0 | glibc +1 | 2.26-lp150.11.17.1 | openSUSE-SU-2019:1250-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nscd +199 | 2.26-36.amzn2 | ALAS2-2020-1517 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | nscd +211 | 2.28-72.0.1.el8 | ELSA-2019-3513 |
| Oracle Linux 7 | nscd +6 | 2.17-292.0.2.el7 | ELSA-2019-2118 |
Advisories 14
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2019:3513 Red Hat Security Advisory: glibc security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2019:2118 Red Hat Security Advisory: glibc security and bug fix update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- SUSE-SU-2019:0903-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10792-1 glibc-2.34-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1250-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1102-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0015-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- WID-SEC-2023-0020 GNU libc: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Jan 3, 2023
- ALAS2-2020-1517 Moderate: glibc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 22, 2020
- ELSA-2019-3513 Moderate: glibc security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 21, 2019
- ELSA-2019-2118 Moderate: glibc security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
References
- https://sourceware.org/bugzilla/show_bug.cgi?id=20018
- 106672 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1347549
- openSUSE-SU-2019:1250 vendor-advisory
- RHSA-2019:2118 vendor-advisory
- RHSA-2019:3513 vendor-advisory