Description
Converting crafted EUC_JISX0213 input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.3 to 2.44 may result in the converter making no progress, causing the calling application to hang.
Some EUC_JISX0213 sequences decode to two code points. If the output buffer has room for only the first one, the converter stores the second in the conversion state and returns E2BIG, but it never clears that pending character after emitting it on the next call. The converter then keeps emitting the pending character without consuming further input, so an application that retries the conversion loops forever. The input must be attacker controlled and the application must convert it with an output buffer small enough to split the two code points. Only the EUC_JISX0213 character set is affected, which is not commonly used. The related defect in SHIFT_JISX0213 converter is tracked separately as CVE-2026-77117.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The GNU C Library | glibc | 2.3 – ≤ 2.44 | — |
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 | 2.43-5 | — |
| Debian 13 | glibc | No fix yet | — |
| Debian 12 | glibc | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | glibc | 2.43-2ubuntu2.4 | USN-8737-1 |
| Ubuntu 24.04 LTS | glibc | 2.39-0ubuntu8.9 | USN-8737-2 |
| Ubuntu 22.04 LTS | glibc | 2.35-0ubuntu3.15 | USN-8737-1 |
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 | 2.39-145.el10_2 | RHSA-2026:84753 |
| RHEL 9 | nscd +214 | 2.34-283.el9_8 | RHSA-2026:79281 |
| RHEL 8 | nscd +213 | 2.28-251.el8_10.48 | RHSA-2026:80798 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | glibc +227 | 2.43-8.4.hum1 | RHSA-2026:61737 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | glibc +220 | 2.39-145.el10_2.alma.1 | ALSA-2026:84753 |
| AlmaLinux 9 | nscd +214 | 2.34-283.el9_8 | ALSA-2026:79281 |
| AlmaLinux 8 | nscd +211 | 2.28-251.el8_10.48 | ALSA-2026:80798 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | glibc | 2.39-145.el10_2 | RLSA-2026:84753 |
| Rocky Linux 9 | glibc | 2.34-283.el9_8 | RLSA-2026:79281 |
| Rocky Linux 8 | glibc | 2.28-251.el8_10.48 | RLSA-2026:80798 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | glibc | 2.38-150600.14.58.1 | SUSE-SU-2026:4250-1 |
| SLES 15 SP6 | glibc | 2.38-150600.14.58.1 | SUSE-SU-2026:4250-1 |
| SLES 15 SP5 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLES 15 SP4 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLES 12 SP5 | glibc | 2.22-114.52.2 | SUSE-SU-2026:4204-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | glibc | 2.40-160000.7.1 | SUSE-SU-2026:23934-1 |
| SLES for SAP 15 SP6 | glibc | 2.38-150600.14.58.1 | SUSE-SU-2026:4250-1 |
| SLES for SAP 15 SP5 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLES for SAP 15 SP4 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLES 16.0 | glibc | 2.40-160000.7.1 | SUSE-SU-2026:23934-1 |
| SLE Micro 6.2 | glibc | 2.40-160000.7.1 | SUSE-SU-2026:23957-1, SUSE-SU-2026:23929-1 |
| SLE Micro 6.1 | glibc | 2.38-slfo.1.1_10.1 | SUSE-SU-2026:23738-1 |
| SLE Micro 6.0 | glibc | 2.38-15.1 | SUSE-SU-2026:23830-1 |
| SLE Micro 5.5 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLE Micro 5.4 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLE Micro 5.3 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLE HPC 15 SP5 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
| SLE HPC 15 SP4 | glibc | 2.31-150300.109.1 | SUSE-SU-2026:4591-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.44-2.1 | openSUSE-SU-2026:11787-1 |
| openSUSE Leap 16.0 | glibc +4 | 2.40-160000.7.1 | openSUSE-SU-2026:21968-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | glibc | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | glibc +220 | 2.39-145.0.1.el10_2 | ELSA-2026-84753 |
| Oracle Linux 9 | nscd +214 | 2.34-283.0.1.el9_8 | ELSA-2026-79281 |
| Oracle Linux 8 | nscd +213 | 2.28-251.0.5.el8_10.48 | ELSA-2026-80798 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | sln-2.43 +26 | 2.43-r18 | — |
| Wolfi rolling | sln-2.44 +26 | 2.44-r4 | — |
Advisories 26
- WID-SEC-2026-3051 GNU libc: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Nov 9, 2026
- ELSA-2026-80798 Moderate: glibc security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 3, 2026
- ELSA-2026-84753 Moderate: glibc security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Nov 2, 2026
- ELSA-2026-79281 Moderate: glibc security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 2, 2026
- ALSA-2026:79281 Moderate: glibc security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:84753 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:80798 Moderate: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- RLSA-2026:84753 Moderate: glibc security update Rocky Linux Security Advisories · Oct 20, 2026
- RHSA-2026:84753 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:80798 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:79281 Red Hat Security Advisory: glibc security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:61737 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RLSA-2026:80798 Moderate: glibc security update Rocky Linux Security Advisories · Oct 14, 2026
- RLSA-2026:79281 Moderate: glibc security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 10, 2026
- SUSE-SU-2026:4591-1 Security update for glibc SUSE / openSUSE Security Updates · Oct 9, 2026
- SUSE-SU-2026:23957-1 Security update for glibc SUSE / openSUSE Security Updates · Oct 2, 2026
- SUSE-SU-2026:23929-1 Security update for glibc SUSE / openSUSE Security Updates · Oct 2, 2026
- SUSE-SU-2026:23934-1 Security update for glibc SUSE / openSUSE Security Updates · Oct 2, 2026
- openSUSE-SU-2026:21968-1 Security update for glibc SUSE / openSUSE Security Updates · Oct 1, 2026
- SUSE-SU-2026:23830-1 Security update for glibc SUSE / openSUSE Security Updates · Sep 27, 2026
- SUSE-SU-2026:23738-1 Security update for glibc SUSE / openSUSE Security Updates · Sep 27, 2026
- SUSE-SU-2026:4250-1 Security update for glibc SUSE / openSUSE Security Updates · Sep 18, 2026
- USN-8737-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Sep 17, 2026
- USN-8737-2 glibc vulnerabilities Ubuntu Security Notices (USN) · Sep 17, 2026
- SUSE-SU-2026:4204-1 Security update for glibc SUSE / openSUSE Security Updates · Sep 16, 2026
- openSUSE-SU-2026:11787-1 glibc-2.44-2.1 on GA media SUSE / openSUSE Security Updates · Sep 16, 2026