Description
The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an application.
This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from systems that do not need them.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The GNU C Library | glibc | 2.3.3 – ≤ 2.43 | — |
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 | 2.42-15 | — |
| Debian 13 | glibc | 2.41-12+deb13u3 | — |
| Debian 12 | glibc | 2.36-9+deb12u14 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | glibc | 2.43-2ubuntu2.3 | USN-8611-1 |
| Ubuntu 25.10 | glibc | No fix yet | — |
| Ubuntu 24.04 LTS | glibc | 2.39-0ubuntu8.8 | USN-8611-1 |
| Ubuntu 22.04 LTS | glibc | 2.35-0ubuntu3.14 | USN-8611-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | glibc | No fix yet | — |
| 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 10 | glibc +220 | 2.39-124.el10_2 | RHSA-2026:20594 |
| RHEL 9 | nscd +214 | 2.34-270.el9_8 | RHSA-2026:20597 |
| RHEL 8 | nscd +213 | 2.28-251.el8_10.37 | RHSA-2026:20587 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | glibc +223 | 2.42-12.hum1 | RHSA-2026:12740 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | glibc +220 | 2.39-124.el10_2.alma.1 | ALSA-2026:20594 |
| AlmaLinux 9 | nscd +214 | 2.34-270.el9_8 | ALSA-2026:20597 |
| AlmaLinux 8 | nscd +213 | 2.28-251.el8_10.37 | ALSA-2026:20587 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | glibc | 2.39-124.el10_2 | RLSA-2026:20594 |
| Rocky Linux 9 | glibc | 2.34-270.el9_8 | RLSA-2026:20597 |
| Rocky Linux 8 | glibc | 2.28-251.el8_10.37 | RLSA-2026:20587 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLES 15 SP4 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLES 12 SP5 | glibc | 2.22-114.46.1 | SUSE-SU-2026:2440-1 |
| SLES 11 SP4 | glibc | 2.11.3-17.110.55.1 | SUSE-SU-2026:2465-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLES for SAP 15 SP4 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLE Micro 6.2 | glibc | 2.40-160000.5.1 | SUSE-SU-2026:21780-1 |
| SLE Micro 5.5 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLE Micro 5.4 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLE Micro 5.3 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLE Live Patching 15 SP7 | glibc-livepatches | 0.4-150700.10.7.1 | SUSE-SU-2026:1501-1 |
| SLE Live Patching 15 SP6 | glibc-livepatches | 0.4-150600.8.5.1 | SUSE-SU-2026:1498-1 |
| SLE HPC 15 SP5 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
| SLE HPC 15 SP4 | glibc | 2.31-150300.101.1 | SUSE-SU-2026:2333-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.43-2.1 | openSUSE-SU-2026:10722-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | nscd +217 | 2.34-231.amzn2023.0.4 | ALAS2023-2026-1622 |
| Amazon Linux 2 | nscd +199 | 2.26-64.amzn2.0.6 | ALAS2-2026-3272 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | glibc | 2.38-20 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | glibc +220 | 2.39-126.0.1.el10_2 | ELSA-2026-20594 |
| Oracle Linux 9 | nscd +214 | 2.34-270.0.1.el9_8 | ELSA-2026-20597 |
| Oracle Linux 8 | nscd +213 | 2.28-251.0.4.el8_10.37 | ELSA-2026-20587 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | sln +51 | 2.43-r6 | — |
Advisories 29
- ALSA-2026:20597 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:20594 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:20587 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-3623 IBM DataPower Gateway: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2026:12740 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- NCSC-2026-0431 Kwetsbaarheden verholpen in IBM DataPower Gateway en onderliggende componenten NCSC-NL (Netherlands) · Oct 16, 2026
- RHSA-2026:20597 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:20594 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2026:20587 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- WID-SEC-2026-0918 GNU libc: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Oct 14, 2026
- SSA-082556 SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5 Siemens ProductCERT · Oct 13, 2026
- VDE-2026-088 METTLER TOLEDO: LabX Standard and Enterprise Report on External Component Analysis - v21.4 CERT@VDE · Sep 10, 2026
- WID-SEC-2026-3038 Meinberg LANTIME: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 26, 2026
- USN-8611-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Jul 27, 2026
- ELSA-2026-20594 Moderate: glibc security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 20, 2026
- SUSE-SU-2026:21780-1 Security update for glibc SUSE / openSUSE Security Updates · Jul 9, 2026
- ELSA-2026-20597 Moderate: glibc security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- SUSE-SU-2026:2465-1 Security update for glibc SUSE / openSUSE Security Updates · Jun 20, 2026
- SUSE-SU-2026:2440-1 Security update for glibc SUSE / openSUSE Security Updates · Jun 19, 2026
- SUSE-SU-2026:2333-1 Security update for glibc SUSE / openSUSE Security Updates · Jun 11, 2026
- RLSA-2026:20594 Moderate: glibc security update Rocky Linux Security Advisories · Jun 4, 2026
- RLSA-2026:20597 Moderate: glibc security update Rocky Linux Security Advisories · May 30, 2026
- RLSA-2026:20587 Moderate: glibc security update Rocky Linux Security Advisories · May 29, 2026
- ELSA-2026-20587 Moderate: glibc security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 26, 2026
- openSUSE-SU-2026:10722-1 glibc-2.43-2.1 on GA media SUSE / openSUSE Security Updates · May 9, 2026
- ALAS2023-2026-1622 Important: glibc security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 30, 2026
- ALAS2-2026-3272 Important: glibc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 29, 2026
- SUSE-SU-2026:1501-1 Security update for glibc-livepatches SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:1498-1 Security update for glibc-livepatches SUSE / openSUSE Security Updates · Apr 22, 2026