CVE-2026-98856

A flaw was found in the Linux kernel's kernel probes (kprobes) tracing subsystem. When arming an optimized probe near an inactive probe, the overlap detection check fails to identify an active jump instruction. A privileged local user can exploit this issue by registering specific overlapping tracepoints, causing the kernel to overwrite instruction bytes and branch to an invalid address. This flaw can lead to a kernel crash resulting in a Denial of Service (DoS) or potentially arbitrary code execution within the kernel context.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.