---
id: CVE-2020-27618
title: >-
  The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier,
  when processing invalid multi-byte input sequences in IBM1364, IBM1371,
  IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state,
  which could…
summary: >-
  The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier,
  when processing invalid multi-byte input sequences in IBM1364, IBM1371,
  IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state,
  which could…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-835
  - CWE-835
vendor: gnu
product: glibc
affected:
  - glibc <= 2.32
  - ontap_select_deploy_administration_utility
  - a250_firmware
  - 500f_firmware
  - h410c_firmware
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h300e_firmware
  - h500e_firmware
  - h700e_firmware
  - h410s_firmware
  - communications_cloud_native_core_service_communication_proxy = 1.14.0
  - debian_linux = 10.0
published: '2021-02-26'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T10:17:33.767'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-27618'
references:
  - url: 'https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html'
    label: cve@mitre.org
  - url: 'https://security.gentoo.org/glsa/202107-07'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20210401-0006/'
    label: cve@mitre.org
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=19519#c21'
    label: cve@mitre.org
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=26224'
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpuapr2022.html'
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpujan2022.html'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202107-07'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20210401-0006/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=19519#c21'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://sourceware.org/bugzilla/show_bug.cgi?id=26224'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpuapr2022.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpujan2022.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-831302.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00895
epssPercentile: 0.58445
ingestedAt: '2026-10-14T10:25:41.188Z'
---

## Overview

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state, which could lead to an infinite loop in applications, resulting in a denial of service, a different vulnerability from CVE-2016-10228.

## Affected

- `glibc <= 2.32`
- `ontap_select_deploy_administration_utility`
- `a250_firmware`
- `500f_firmware`
- `h410c_firmware`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h300e_firmware`
- `h500e_firmware`
- `h700e_firmware`
- `h410s_firmware`
- `communications_cloud_native_core_service_communication_proxy = 1.14.0`
- `debian_linux = 10.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.