Description
The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.
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 | 2.31-7 | — |
| Debian 13 | glibc | 2.31-7 | — |
| Debian 12 | glibc | 2.31-7 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | glibc | 2.31-0ubuntu9.7 | USN-5310-1 |
| Ubuntu 18.04 LTS | glibc | 2.27-3ubuntu1.5 | USN-5310-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SLES 15 SP1 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SLES 15 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SLES 12 SP5 | glibc | 2.22-114.8.3 | SUSE-SU-2021:1165-1 |
| SLES 12 SP4 | glibc | 2.22-114.8.3 | SUSE-SU-2021:1165-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | glibc | 2.22-126.1 | SUSE-SU-2022:2886-1 |
| SLES 12 SP2 | glibc | 2.22-126.1 | SUSE-SU-2022:2886-1 |
| SLES 11 SP4 | glibc | 2.11.3-17.110.43.1 | SUSE-SU-2024:0759-1 |
| SLES for SAP 15 SP1 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SLES for SAP 15 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SLES for SAP 12 SP5 | glibc | 2.22-114.8.3 | SUSE-SU-2021:1165-1 |
| SLES for SAP 12 SP4 | glibc | 2.22-114.8.3 | SUSE-SU-2021:1165-1 |
| SLE HPC 15 SP1 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SLE HPC 15 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SUSE OpenStack Cloud Crowbar 9 | glibc | 2.22-114.8.3 | SUSE-SU-2021:1165-1 |
| SUSE OpenStack Cloud 9 | glibc | 2.22-114.8.3 | SUSE-SU-2021:1165-1 |
| SUSE Manager Server 4.0 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SUSE Manager Retail Branch Server 4.0 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SUSE Manager Proxy 4.0 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
| SUSE Enterprise Storage 6 | glibc | 2.26-13.56.1 | SUSE-SU-2021:0653-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.34-1.2 | openSUSE-SU-2024:10792-1 |
| openSUSE Leap 15.2 | glibc +1 | 2.26-lp152.26.6.1 | openSUSE-SU-2021:0358-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nscd +199 | 2.26-41.amzn2 | ALAS2-2021-1605 |
Advisories 15
- 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
- USN-5310-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2024:0759-1 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
- SUSE-SU-2021:1165-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0653-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0358-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2886-1 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
- VDE-2022-010 PHOENIX CONTACT: Multiple Linux component vulnerabilities fixed in latest AXC F x152 LTS release CERT@VDE · May 22, 2025
- ICSA-23-166-10 Siemens SIMATIC S7-1500 TM MFP BIOS CISA ICS & IT advisories · Apr 9, 2024
- SSA-831302 SSA-831302: Vulnerabilities in the BIOS of the SIMATIC S7-1500 TM MFP before V1.3.0 Siemens ProductCERT · Apr 9, 2024
- WID-SEC-2022-1169 GNU libc: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 5, 2024
- WID-SEC-2023-1432 Siemens SIMATIC S7: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 22, 2023
- ALAS2-2021-1605 Important: glibc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 19, 2021
References
- https://sourceware.org/bugzilla/show_bug.cgi?id=26923
- FEDORA-2021-6e581c051a vendor-advisory
- https://security.netapp.com/advisory/ntap-20210122-0004/
- GLSA-202101-20 vendor-advisory
- [mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar mailing-list