---
id: CVE-2026-98060
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Reject resilient lock operations in rbtree callbacks

  __bpf_rbtree_add() keeps parent and link pointers live across calls to the
  program-supplied comparison callba…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Reject resilient lock operations in rbtree callbacks

  __bpf_rbtree_add() keeps parent and link pointers live across calls to the
  program-supplied comparison callba…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 0de2046137f976e7302d43ac01d9894d07ac1fff <
    cc2e065ed206aecd9b94564779244f3ffb26e356
  - >-
    Linux >= 0de2046137f976e7302d43ac01d9894d07ac1fff <
    71930202a0a0c49f0a3b45b41907a074cb780266
  - >-
    Linux >= 0de2046137f976e7302d43ac01d9894d07ac1fff <
    7b7b8b5960102566bd625ae829d1f330c5b5d104
  - Linux 6.15
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:35.000'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98060'
references:
  - url: 'https://git.kernel.org/stable/c/71930202a0a0c49f0a3b45b41907a074cb780266'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7b7b8b5960102566bd625ae829d1f330c5b5d104'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cc2e065ed206aecd9b94564779244f3ffb26e356'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.842Z'
---

## Overview

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

bpf: Reject resilient lock operations in rbtree callbacks

__bpf_rbtree_add() keeps parent and link pointers live across calls to the
program-supplied comparison callback. The verifier therefore requires the
root's lock to remain held throughout the callback.

The helper path enforces this rule for bpf_spin_lock() and
bpf_spin_unlock(), but the resilient lock kfunc argument path does not.
Since resilient locks may protect BPF rbtree roots, a callback can release
the root lock and let another CPU remove and free the node referenced by
the in-progress tree walk. The walk then resumes using freed pointers.

Reject resilient lock kfuncs in an rbtree comparison callback, matching
the existing policy for the spin lock helpers. Resilient-lock-protected
trees remain valid when their comparison callbacks leave lock state alone.

## Remediation

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