CVE-2024-6760: ktrace(2) fails to detach when executing a setuid binary

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-08-12 · updated 2026-06-17
Weakness: CWE-862

Description

A logic bug in the code which disables kernel tracing for setuid programs meant that tracing was not disabled when it should have, allowing unprivileged users to trace and inspect the behavior of setuid programs. The bug may be used by an unprivileged user to read the contents of files to which they would not otherwise have access, such as the local password database.

Affected products

FreeBSD: before 13.0; from 13.1 before 13.3; 13.3-p1, 13.3-p2, 13.3-p3, 13.3-p4, 14.0-beta5, 14.0-p1 (+11) — fixed in 13.0, 13.3

How to fix

Upgrade to a fixed version: FreeBSD 13.0, 13.3. Check the vendor advisory for mitigations.

References

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