---
id: CVE-2025-68200
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Add bpf_prog_run_data_pointers()

  syzbot found that cls_bpf_classify() is able to change
  tc_skb_cb(skb)->drop_reason triggering a warning in sk_skb_reason_drop().
  …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Add bpf_prog_run_data_pointers()

  syzbot found that cls_bpf_classify() is able to change
  tc_skb_cb(skb)->drop_reason triggering a warning in sk_skb_reason_drop().
  …
severity: none
published: '2025-12-16'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68200'
references:
  - url: 'https://git.kernel.org/stable/c/4ef92743625818932b9c320152b58274c05e5053'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5e149d8a8e732126fb6014efd60075cf63a73f91'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6392e5f4b1a3cce10e828309baf35d22abd3457d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8dd2fe5f5d586c8e87307b7a271f6b994afcc006'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/baa61dcaa50b7141048c8d2aede7fe9ed8f21d11'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c4cdd143c35974a2cedd000fa9eb3accc3023b20'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00207
epssPercentile: 0.10007
ingestedAt: '2026-10-14T13:30:58.452Z'
---

## Overview

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

bpf: Add bpf_prog_run_data_pointers()

syzbot found that cls_bpf_classify() is able to change
tc_skb_cb(skb)->drop_reason triggering a warning in sk_skb_reason_drop().

WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 __sk_skb_reason_drop net/core/skbuff.c:1189 [inline]
WARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 sk_skb_reason_drop+0x76/0x170 net/core/skbuff.c:1214

struct tc_skb_cb has been added in commit ec624fe740b4 ("net/sched:
Extend qdisc control block with tc control block"), which added a wrong
interaction with db58ba459202 ("bpf: wire in data and data_end for
cls_act_bpf").

drop_reason was added later.

Add bpf_prog_run_data_pointers() helper to save/restore the net_sched
storage colliding with BPF data_meta/data_end.

## Remediation

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