CVE-2021-40490 Race condition in n/a

What is CVE-2021-40490?

CVE-2021-40490 is a high-severity vulnerability in Debian Debian Linux, published on 3 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in the Linux kernel through 5.13.13.

Weakness: CWE-362

Which versions are affected by CVE-2021-40490?

It affects 17 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Netapp Aff A250 Firmware, Netapp Fas 500f Firmware, Netapp H300e Firmware and 11 more.

How do I fix CVE-2021-40490?

Apply the vendor's patch.

Is CVE-2021-40490 being exploited?

There is no known exploitation of CVE-2021-40490 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 A-199579676, AZL-6595, DEBIAN-CVE-2021-40490, GHSA-w749-qfxr-r5v8, PUB-A-199579676, UBUNTU-CVE-2021-40490.