VYPR
High severity7.1NVD Advisory· Published Feb 14, 2026· Updated Jun 1, 2026

CVE-2026-23204

CVE-2026-23204

Description

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

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Affected products

254

Patches

Vulnerability mechanics

References

6

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