---
id: CVE-2026-90217
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Compare iterator types during state pruning

  An iterator stack slot can be MEM_RCU or PTR_UNTRUSTED
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Compare iterator types during state pruning

  An iterator stack slot can be MEM_RCU or PTR_UNTRUSTED. These states
  must not be equal, or the verifier can prune an u…
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'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= dfab99df147b0d364f0c199f832ff2aedfb2265a <
    6424b9cde9edc7f2098115bbfd1ee3d84a958380
  - >-
    Linux >= dfab99df147b0d364f0c199f832ff2aedfb2265a <
    83608e303b95d07afba1c15da0b5d9e513c2f15a
  - Linux 6.7
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:46.850'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90217'
references:
  - url: 'https://git.kernel.org/stable/c/6424b9cde9edc7f2098115bbfd1ee3d84a958380'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/83608e303b95d07afba1c15da0b5d9e513c2f15a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00165
epssPercentile: 0.05028
ingestedAt: '2026-09-17T16:21:47.856Z'
---

## Overview

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

bpf: Compare iterator types during state pruning

An iterator stack slot can be MEM_RCU or PTR_UNTRUSTED. These states
must not be equal, or the verifier can prune an unsafe path.

Compare the pointer type for STACK_ITER slots.

## Remediation

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