CVE-2020-27618 Denial of service in n/a

What is CVE-2020-27618?

CVE-2020-27618 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 26 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-835

Which versions are affected by CVE-2020-27618?

It affects 14 products.

Products include Debian Debian Linux, Gnu Glibc, Netapp 500f Firmware, Netapp A250 Firmware, Netapp H300e Firmware, Netapp H300s Firmware and 8 more.

How do I fix CVE-2020-27618?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-27618 being exploited?

There is no known exploitation of CVE-2020-27618 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-27618, GHSA-6q5q-4c7r-7r4r, UBUNTU-CVE-2020-27618.