{"id":"CVE-2026-98853","title":"kernel: net: gso: limit recursive IP-in-IP segmentation (CVE-2026-98853)","summary":"A flaw was found in the Linux kernel's Generic Segmentation Offload (GSO) implementation. When processing deeply nested IP-in-IP packets, recursive segmentation is not properly restricted, which can exhaust kernel stack memory. A remote at…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-770","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T15:22:58+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98853.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98853.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98853"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555206"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98853"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98853"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98853.mbox"},{"url":"https://git.kernel.org/stable/c/c949646c900e879afce47df1b607fa320eb63bf2"},{"url":"https://git.kernel.org/stable/c/006c8b834aed8b02bd8fb9fb05e9e7ead37d1763"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00145,"epssPercentile":0.03744,"ingestedAt":"2026-10-18T16:47:32.462Z","slug":"CVE-2026-98853","body":"## Overview\n\nA flaw was found in the Linux kernel's Generic Segmentation Offload (GSO) implementation. When processing deeply nested IP-in-IP packets, recursive segmentation is not properly restricted, which can exhaust kernel stack memory. A remote attacker could exploit this vulnerability by transmitting network packets with excessive encapsulation layers, causing a kernel crash and leading to a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98853.json)\n\n**kernel: net: gso: limit recursive IP-in-IP segmentation** — rated Important 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 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\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 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nAffected","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228750,"id":"CVE-2026-98853","ts":1792844947956,"field":"cvss","old":null,"new":"7.5"},{"seq":228749,"id":"CVE-2026-98853","ts":1792844947956,"field":"severity","old":"none","new":"high"}]}