CVE-2026-45253

High

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.

SeverityHigh

CVSS8.4

Exploit probability—

Product

Freebsd

PublishedMay 21, 2026

First seenMay 21, 2026

Weakness typeCWE-787Out-of-bounds write

How to fix

Vendor advisories

security.freebsd.org/advisories/FreeBSD-SA-26:21.ptrace.asc

Affected products

Product	Affected versions	Fixed in
freebsd freebsd	14.3, 14.4, 15.0	—

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