---
id: CVE-2026-74720
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Preserve pointer state for commuted arithmetic

  When scalar += pointer is handled in adjust_ptr_min_max_vals(), the
  destination register inherits the pointer state…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Preserve pointer state for commuted arithmetic

  When scalar += pointer is handled in adjust_ptr_min_max_vals(), the
  destination register inherits the pointer state…
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'
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74720'
references:
  - url: 'https://git.kernel.org/stable/c/29c239f8dbec5ab33a61796724d189bddee6cd4b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8109c25e0c41f5f19a1c2380bb49c991a877494e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/86b203aadc2930e0a4f9c6277b5b80ff3664c472'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a4c6f804b44c5c790269b25e0e61cf4e9f117c86'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d1959028190a7649b926f5867a58de5fe221b23c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/db6382ed3361bdd8129572a3423956cba1dae829'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/eaffa1495e4fe6330aeff9f323ea3d48b01f118a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00129
epssPercentile: 0.02239
ingestedAt: '2026-10-14T13:30:58.547Z'
---

## Overview

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

bpf: Preserve pointer state for commuted arithmetic

When scalar += pointer is handled in adjust_ptr_min_max_vals(), the
destination register inherits the pointer state from the source pointer.
Copying only selected fields is fragile because pointer provenance is
tracked by several bpf_reg_state fields.

Use the caller's temporary offset register to preserve the scalar operand
while replacing the destination with the full pointer state. This preserves
the frame number for PTR_TO_STACK registers and keeps parent identity
fields consistent.

## Remediation

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