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CVE-2026-23204

Severity CVSS v4.0:
Pending analysis
Type:
CWE-125 Out-of-bounds Read
Publication date:
14/02/2026
Last modified:
03/04/2026

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

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x
7.10
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.35.1 (including) 6.6.124 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.70 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.10 (excluding)
cpe:2.3:o:linux:linux_kernel:2.6.35:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.35:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.35:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.35:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.35:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.35:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools