CVE Database›Document archive›CVE-2026-53092

CVE-2026-53092

kernel: bpf: Fix linked reg delta tracking when src_reg == dst_reg

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Severity

Moderate

Red Hat Product Security

6.4

CVSS 3.1

Review impact separately from score.

Published · June 24, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) subsystem. This vulnerability occurs due to incorrect delta tracking when source and destination registers are the same during register value adjustments. This can lead to a mismatch between the BPF verifier's analysis and the actual runtime behavior of BPF programs, potentially allowing a malicious BPF program to bypass security checks.

Statement

This CVE has been rated as Moderate because eBPF (and XDP) is restricted to root-only on Red Hat Enterprise Linux.

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 · 6.4
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE-393 · Return of Wrong Status Code