CVE-2026-23417
kernel: bpf: Fix constant blinding for PROBE_MEM32 stores
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 2, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) component. This vulnerability occurs because the BPF_ST | BPF_PROBE_MEM32 immediate stores are not correctly handled by the constant blinding mechanism. As a result, user-controlled 32-bit immediate values can remain unblinded in JIT-compiled native code, potentially allowing an attacker to bypass security hardening measures.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-807 · Reliance on Untrusted Inputs in a Security Decision