CVE-2026-68171

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the arm64 architecture where the saved value of register x0 is not kept in sync with updates made by a tracer. On arm64, register x0 holds both the first argument of a syscall and its return value. The original value of x0 is stored in struct pt regs::orig x0 during the syscall entry path and is used by syscall get arguments(). Because this stashed value is not exposed via ptrace(), changes made by a tracer to register x0 during a syscall-enter-stop are not reflected in orig x0. Consequently, seccomp, syscall tracepoints, and audit mechanisms may observe a stale value instead of the actual argument used by the syscall.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.