{"id":"CVE-2026-98798","title":"kernel: net: bcmgenet: fix NULL dereference in set_coalesce before first open (CVE-2026-98798)","summary":"A flaw was found in the Linux kernel's Broadcom GENET network driver. A privileged local user could trigger a Denial of Service (DoS) by configuring receive coalescing settings on a network interface that has not yet been opened. This flaw…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-476","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T15:35:35+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98798.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98798.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98798"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555056"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98798"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98798"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98798.mbox"},{"url":"https://git.kernel.org/stable/c/213ff02ab26a4543ef02b4db393bbdd5fa5679a7"},{"url":"https://git.kernel.org/stable/c/0d867b91598b6ed2f75998c34f4e2869631da31e"},{"url":"https://git.kernel.org/stable/c/2294b62eaec6fd3c76a261d287f66641eeafd5f0"},{"url":"https://git.kernel.org/stable/c/d870102b5425390cab42eebbf3d19ec6a43c6734"},{"url":"https://git.kernel.org/stable/c/19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.05983,"ingestedAt":"2026-10-18T16:47:32.483Z","slug":"CVE-2026-98798","body":"## Overview\n\nA flaw was found in the Linux kernel's Broadcom GENET network driver. A privileged local user could trigger a Denial of Service (DoS) by configuring receive coalescing settings on a network interface that has not yet been opened. This flaw leads to a null pointer dereference that can crash the kernel or lock networking operations, requiring a system reboot to restore service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98798.json)\n\n**kernel: net: bcmgenet: fix NULL dereference in set_coalesce before first open** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228724,"id":"CVE-2026-98798","ts":1792844937530,"field":"cvss","old":null,"new":"4.4"},{"seq":228723,"id":"CVE-2026-98798","ts":1792844937530,"field":"severity","old":"none","new":"medium"}]}