CVE-2021-41990 Integer overflow in n/a

What is CVE-2021-41990?

CVE-2021-41990 is a high-severity vulnerability in Debian Debian Linux, published on 18 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The gmp plugin in strongSwan before 5.9.4 has a remote integer overflow via a crafted certificate with an RSASSA-PSS signature. For example, this can be triggered by an unrelated self-signed CA certificate sent by an initiator. Remote code execution cannot occur.

Weakness: CWE-190

Which versions are affected by CVE-2021-41990?

It affects 20 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Siemens 6gk5615-0aa00-2aa2 Firmware, Siemens 6gk5804-0ap00-2aa2 Firmware, Siemens 6gk5812-1aa00-2aa2 Firmware, Siemens 6gk5812-1ba00-2aa2 Firmware and 14 more.

How do I fix CVE-2021-41990?

Upgrade to a fixed version.

Is CVE-2021-41990 being exploited?

There is no known exploitation of CVE-2021-41990 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 ALPINE-CVE-2021-41990, AZL-6896, DEBIAN-CVE-2021-41990, GHSA-3wp5-cvp4-5h42, UBUNTU-CVE-2021-41990.