CVE-2026-23204
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
14/02/2026
Last modified:
14/02/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
net/sched: cls_u32: use skb_header_pointer_careful()<br />
<br />
skb_header_pointer() does not fully validate negative @offset values.<br />
<br />
Use skb_header_pointer_careful() instead.<br />
<br />
GangMin Kim provided a report and a repro fooling u32_classify():<br />
<br />
BUG: KASAN: slab-out-of-bounds in u32_classify+0x1180/0x11b0<br />
net/sched/cls_u32.c:221