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CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-68200

bpf: Add bpf_prog_run_data_pointers()

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 0d76daf2013ce1da20eab5e26bd81d983e1c18fb to < c4cdd143c35974a2cedd000fa9eb3accc3023b20affected
  • ec624fe740b416fb68d536b37fb8eef46f90b5c2 to < 5e149d8a8e732126fb6014efd60075cf63a73f91affected
  • ec624fe740b416fb68d536b37fb8eef46f90b5c2 to < baa61dcaa50b7141048c8d2aede7fe9ed8f21d11affected
  • ec624fe740b416fb68d536b37fb8eef46f90b5c2 to < 6392e5f4b1a3cce10e828309baf35d22abd3457daffected
  • ec624fe740b416fb68d536b37fb8eef46f90b5c2 to < 8dd2fe5f5d586c8e87307b7a271f6b994afcc006affected
  • ec624fe740b416fb68d536b37fb8eef46f90b5c2 to < 4ef92743625818932b9c320152b58274c05e5053affected
  • 5.15.13 to < 5.15.197affected

Linux Linux

Default version status: affected

  • 5.16affected
  • 0 to < 5.16unaffected
  • 5.15.197 to ≤ 5.15.*unaffected
  • 6.1.159 to ≤ 6.1.*unaffected
  • 6.6.117 to ≤ 6.6.*unaffected
  • 6.12.59 to ≤ 6.12.*unaffected
  • 6.17.9 to ≤ 6.17.*unaffected
  • 6.18 to ≤ *unaffected

References