CVE-2026-23204

CWE-125 — Out-of-bounds Read CWE-12859 documents9 sources

Severity

7.1HIGH

EPSS

0.0%

top 96.72%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Linux Linux Linux Linux Kernel

Timeline

PublishedFeb 14

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

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HExploitability: 1.8 | Impact: 5.2

Affected Packages3 packages

▶NVDlinux/linux_kernel2.6.35.1 — 6.6.124+4

▶CVEListV5linux/linuxfbc2e7d9cf49e0bf89b9e91fd60a06851a855c5d — cfa745830e45ecb75c061aa34330ee0cac941cc7+5

▶Debianlinux< 6.12.73-1+1

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

GHSA

GHSA-rf63-9f5h-hhg6: In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does n↗2026-02-14

▶

CVEList

net/sched: cls_u32: use skb_header_pointer_careful()↗2026-02-14

▶

OSV

CVE-2026-23204: In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does not↗2026-02-14

▶

📋Vendor Advisories

Red Hat

kernel: net/sched: cls_u32: use skb_header_pointer_careful()↗2026-02-14

▶

Microsoft

net/sched: cls_u32: use skb_header_pointer_careful()↗2026-02-10

▶

Debian

CVE-2026-23204: linux - In the Linux kernel, the following vulnerability has been resolved: net/sched: ...↗2026

▶

🕵️Threat Intelligence

Wiz

CVE-2026-23204 Impact, Exploitability, and Mitigation Steps | Wiz↗

▶

💬Community

Bugzilla

CVE-2026-23204 kernel: net/sched: cls_u32: use skb_header_pointer_careful()↗2026-02-14

▶