---
id: CVE-2026-53092
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

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

  Consider the case of rX += rX where src_reg and dst_reg are pointers to
  the same bpf_reg_state in adjust_reg…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

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

  Consider the case of rX += rX where src_reg and dst_reg are pointers to
  the same bpf_reg_state in adjust_reg…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-393
published: '2026-06-24'
updated: '2026-07-06'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53092'
references:
  - url: 'https://git.kernel.org/stable/c/cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d7f14173c0d5866c3cae759dee560ad1bed10d2e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://access.redhat.com/security/cve/CVE-2026-53092'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2492362'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53092.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.0018
epssPercentile: 0.06793
ingestedAt: '2026-07-06T17:44:51.323Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

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

Consider the case of rX += rX where src_reg and dst_reg are pointers to
the same bpf_reg_state in adjust_reg_min_max_vals(). The latter first
modifies the dst_reg in-place, and later in the delta tracking, the
subsequent is_reg_const(src_reg)/reg_const_value(src_reg) reads the
post-{add,sub} value instead of the original source.

This is problematic since it sets an incorrect delta, which sync_linked_regs()
then propagates to linked registers, thus creating a verifier-vs-runtime
mismatch. Fix it by just skipping this corner case.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.