CVE-2026-45253

Missing validation in ptrace(PT_SC_REMOTE)

State: Published
Severity: 8.4 High
Published: May 21, 2026
Updated: May 22, 2026
Reserved: May 11, 2026

Description

ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges.

The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.

Scores

CVSS	Score	Vector	Source
3.1	8.4 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
FreeBSDFreeBSD	15.0-RELEASE to before p9Affected 14.4-RELEASE to before p5Affected 14.3-RELEASE to before p14Affected

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:21.ptrace.ascvendor-advisory

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