CVE-2025-68200
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.
How to fix
- Linux Linuxc4cdd143c35974a2cedd000fa9eb3accc3023b20, 5e149d8a8e732126fb6014efd60075cf63a73f91, baa61dcaa50b7141048c8d2aede7fe9ed8f21d11, 6392e5f4b1a3cce10e828309baf35d22abd3457d, 8dd2fe5f5d586c8e87307b7a271f6b994afcc006, 4ef92743625818932b9c320152b58274c05e5053, 5.15.197 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 0d76daf2013ce1da20eab5e26bd81d983e1c18fb ≤ v < c4cdd143c35974a2cedd000fa9eb3accc3023b20, ec624fe740b416fb68d536b37fb8eef46f90b5c2 ≤ v < 5e149d8a8e732126fb6014efd60075cf63a73f91, ec624fe740b416fb68d536b37fb8eef46f90b5c2 ≤ v < baa61dcaa50b7141048c8d2aede7fe9ed8f21d11, ec624fe740b416fb68d536b37fb8eef46f90b5c2 ≤ v < 6392e5f4b1a3cce10e828309baf35d22abd3457d, ec624fe740b416fb68d536b37fb8eef46f90b5c2 ≤ v < 8dd2fe5f5d586c8e87307b7a271f6b994afcc006, ec624fe740b416fb68d536b37fb8eef46f90b5c2 ≤ v < 4ef92743625818932b9c320152b58274c05e5053, 5.15.13 ≤ v < 5.15.197, 5.16 | c4cdd143c35974a2cedd000fa9eb3accc3023b20, 5e149d8a8e732126fb6014efd60075cf63a73f91, baa61dcaa50b7141048c8d2aede7fe9ed8f21d11, 6392e5f4b1a3cce10e828309baf35d22abd3457d, 8dd2fe5f5d586c8e87307b7a271f6b994afcc006, 4ef92743625818932b9c320152b58274c05e5053, 5.15.197 |
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