ghsa-jxw4-crcg-x436
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2025-68200"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-16T14:15:52Z",
"severity": null
},
"details": "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": "GHSA-jxw4-crcg-x436",
"modified": "2025-12-16T15:30:45Z",
"published": "2025-12-16T15:30:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68200"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4ef92743625818932b9c320152b58274c05e5053"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5e149d8a8e732126fb6014efd60075cf63a73f91"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6392e5f4b1a3cce10e828309baf35d22abd3457d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8dd2fe5f5d586c8e87307b7a271f6b994afcc006"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/baa61dcaa50b7141048c8d2aede7fe9ed8f21d11"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c4cdd143c35974a2cedd000fa9eb3accc3023b20"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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