High · published February 14, 2026
In the Linux kernel, the following vulnerability has been resolved:
net/sched: cls_u32: use skb_header_pointer_careful()
skb_header_pointer() does not fully validate negative @offset values.
Use skb_header_pointer_careful() instead.
GangMin Kim provided a report and a repro fooling u32_classify():
BUG: KASAN: slab-out-of-bounds in u32_classify+0x1180/0x11b0
net/sched/cls_u32.c:221
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 2.6.35.1, < 6.6.124 | 6.6.124 |
| linux/linux_kernel | ≥ 6.7, < 6.12.70 | 6.12.70 |
| linux/linux_kernel | ≥ 6.13, < 6.18.10 | 6.18.10 |
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