Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-05-06T00:00:00 kernel: net/sched: act_skbedit: fix divide-by-zero in tcf_skbedit_hash() 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CWE-190

A flaw was found in the Linux kernel. A divide-by-zero vulnerability exists in the `tcf_skbedit_hash()` function within the networking scheduler component. This occurs when calculating the `mapping_mod` value, where a large range wraps to zero, leading to a division by zero error. This flaw can cause a system crash, resulting in a Denial of Service (DoS).

Red Hat Enterprise Linux 10 Affected kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Affected kernel Red Hat Enterprise Linux 8 Affected kernel-rt Red Hat Enterprise Linux 9 Affected kernel Red Hat Enterprise Linux 9 Affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-43238 https://nvd.nist.gov/vuln/detail/CVE-2026-43238 https://lore.kernel.org/linux-cve-announce/2026050659-CVE-2026-43238-6bb9@gregkh/T