CVE-2026-93164

kernel: uprobes/x86: Move optimized uprobe from nop5 to nop10

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 20, 2026

Description

A flaw was found in the Linux kernel. Optimized uprobes, a mechanism for dynamic tracing, can improperly overwrite a protected memory region known as the redzone area. This occurs when a call instruction stores a return address on the stack without adequately adjusting the stack pointer, potentially corrupting temporary data used by user code. This memory corruption could lead to system instability or unexpected behavior.

CVSS score applicability

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.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')