CVE-2026-23204 – net/sched: cls_u32: use skb_header_pointer_careful()

CVE ID : CVE-2026-23204

Published : Feb. 14, 2026, 5:15 p.m. | 1 hour, 14 minutes ago

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

Severity: 0.0 | NA

Visit the link for more details, such as CVSS details, affected products, timeline, and more…