# CVE-2020-29562: glibc-source: The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an ir...

CVE-2020-29562 is fixed in 21 products on 1 platform, first by glibc-source 2.27-3ubuntu1.5, released January 31, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-29562
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0168
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 3, 2020

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | glibc-source Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [glibc-source 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-glibc-source-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | glibc-source Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [glibc-source 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-glibc-source-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc-bin Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc-bin 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc-bin-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc-bin Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc-bin 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc-bin-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc-dev-bin Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc-dev-bin 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc-dev-bin-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc-dev-bin Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc-dev-bin 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc-dev-bin-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-amd64 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-amd64 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-amd64-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-amd64 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-amd64 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-amd64-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-armel Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-armel 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-armel-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-armel Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-armel 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-armel-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-dev-amd64 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-dev-amd64 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-dev-amd64-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-dev-amd64 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-dev-amd64 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-dev-amd64-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-dev-armel Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-dev-armel 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-dev-armel-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-dev-armel Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-dev-armel 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-dev-armel-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-dev-i386 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-dev-i386 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-dev-i386-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-dev-i386 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-dev-i386 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-dev-i386-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-dev-s390 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-dev-s390 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-dev-s390-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-dev-s390 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-dev-s390 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-dev-s390-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-dev-x32 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-dev-x32 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-dev-x32-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-dev-x32 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-dev-x32 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-dev-x32-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-i386 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-i386 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-i386-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-i386 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-i386 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-i386-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-lse Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-lse 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-lse-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-lse Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-lse 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-lse-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-pic Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-pic 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-pic-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-pic Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-pic 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-pic-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-prof Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-prof 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-prof-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-s390 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-s390 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-s390-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-s390 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-s390 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-s390-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | libc6-x32 Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [libc6-x32 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc6-x32-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | libc6-x32 Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [libc6-x32 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc6-x32-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | locales Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [locales 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-locales-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | locales Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [locales 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-locales-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | locales-all Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [locales-all 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-locales-all-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | locales-all Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [locales-all 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-locales-all-2.31-0ubuntu9.7.md) | Jan 31, 2022 |
| Linux | multiarch-support Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [multiarch-support 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-multiarch-support-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | nscd Ubuntu 18.04.6 LTS (bionic) | 2.27-3ubuntu1.5 | [nscd 2.27-3ubuntu1.5](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-nscd-2.27-3ubuntu1.5.md) | Jan 31, 2022 |
| Linux | nscd Ubuntu 20.04 LTS (focal) | 2.31-0ubuntu9.7 | [nscd 2.31-0ubuntu9.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-nscd-2.31-0ubuntu9.7.md) | Jan 31, 2022 |

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