{"id":"CVE-2026-98850","title":"kernel: net/packet: prevent TX_RING byte count overflow (CVE-2026-98850)","summary":"A flaw was found in the Linux kernel's packet socket implementation. An integer overflow occurs in the transmission ring buffer when calculating the total byte count of transmitted frames during a send operation. A local user with raw netw…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-190","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":"2026-10-24","sourceUpdated":"2026-10-24T08:09:04+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98850.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98850.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98850"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555213"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98850"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98850"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98850.mbox"},{"url":"https://git.kernel.org/stable/c/ae169d318d5d23bac76ece90a7e2b5cb760ed043"},{"url":"https://git.kernel.org/stable/c/be12b221c0301111eeb023be04add3c6ad7c21fe"},{"url":"https://git.kernel.org/stable/c/69ca64bbb528898916f309552053c32a04a36ebc"},{"url":"https://git.kernel.org/stable/c/9fd63d284e251332f4874ef9023cde472f315f86"},{"url":"https://git.kernel.org/stable/c/2cf81fc9505b148b1b70068303ea6ea4b1212403"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00157,"epssPercentile":0.04764,"ingestedAt":"2026-10-18T16:47:32.464Z","slug":"CVE-2026-98850","body":"## Overview\n\nA flaw was found in the Linux kernel's packet socket implementation. An integer overflow occurs in the transmission ring buffer when calculating the total byte count of transmitted frames during a send operation. A local user with raw network privileges can exploit this issue to trigger an internal kernel error, leading to a system crash and resulting in a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · 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 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98850.json)\n\n**kernel: net/packet: prevent TX_RING byte count overflow** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.\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 6\n- Red Hat Enterprise Linux 10\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\nOut of support scope","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228514,"id":"CVE-2026-98850","ts":1792844771350,"field":"cvss","old":null,"new":"5.5"},{"seq":228513,"id":"CVE-2026-98850","ts":1792844771350,"field":"severity","old":"none","new":"medium"}]}