fkie_cve-2025-68200
Vulnerability from fkie_nvd
Published
2025-12-16 14:15
Modified
2025-12-18 15:08
Severity ?
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(). 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ef92743625818932b9c320152b58274c05e5053
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e149d8a8e732126fb6014efd60075cf63a73f91
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6392e5f4b1a3cce10e828309baf35d22abd3457d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8dd2fe5f5d586c8e87307b7a271f6b994afcc006
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/baa61dcaa50b7141048c8d2aede7fe9ed8f21d11
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c4cdd143c35974a2cedd000fa9eb3accc3023b20
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Add bpf_prog_run_data_pointers()\n\nsyzbot found that cls_bpf_classify() is able to change\ntc_skb_cb(skb)-\u003edrop_reason triggering a warning in sk_skb_reason_drop().\n\nWARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 __sk_skb_reason_drop net/core/skbuff.c:1189 [inline]\nWARNING: CPU: 0 PID: 5965 at net/core/skbuff.c:1192 sk_skb_reason_drop+0x76/0x170 net/core/skbuff.c:1214\n\nstruct tc_skb_cb has been added in commit ec624fe740b4 (\"net/sched:\nExtend qdisc control block with tc control block\"), which added a wrong\ninteraction with db58ba459202 (\"bpf: wire in data and data_end for\ncls_act_bpf\").\n\ndrop_reason was added later.\n\nAdd bpf_prog_run_data_pointers() helper to save/restore the net_sched\nstorage colliding with BPF data_meta/data_end."
    }
  ],
  "id": "CVE-2025-68200",
  "lastModified": "2025-12-18T15:08:25.907",
  "metrics": {},
  "published": "2025-12-16T14:15:52.820",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4ef92743625818932b9c320152b58274c05e5053"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5e149d8a8e732126fb6014efd60075cf63a73f91"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6392e5f4b1a3cce10e828309baf35d22abd3457d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8dd2fe5f5d586c8e87307b7a271f6b994afcc006"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/baa61dcaa50b7141048c8d2aede7fe9ed8f21d11"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c4cdd143c35974a2cedd000fa9eb3accc3023b20"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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