CVE-2021-3567

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-25 · updated 2026-06-17
Weakness: CWE-20

Description

A flaw was found in Caribou due to a regression of CVE-2020-25712 fix. An attacker could use this flaw to bypass screen-locking applications that leverage Caribou as an input mechanism. The highest threat from this vulnerability is to system availability.

Affected products

caribou: before 0.4.21 — fixed in 0.4.21

How to fix

Upgrade to a fixed version: caribou 0.4.21. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1962836
https://bugzilla.redhat.com/show_bug.cgi?id=1962836

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