CVE-2021-3411

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-03-09 · updated 2026-06-17
Weakness: CWE-94

Description

A flaw was found in the Linux kernel in versions prior to 5.10. A violation of memory access was found while detecting a padding of int3 in the linking state. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Affected products

Linux kernel: before 5.10 — fixed in 5.10
Red Hat Enterprise Linux: 8.0

How to fix

Upgrade to a fixed version: Linux kernel 5.10. Check the vendor advisory for mitigations.

References

http://blog.pi3.com.pl/?p=831
https://bugzilla.redhat.com/show_bug.cgi?id=1928236
http://blog.pi3.com.pl/?p=831
https://bugzilla.redhat.com/show_bug.cgi?id=1928236

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