{"id":"CVE-2026-89482","title":"kernel: nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone (CVE-2026-89482)","summary":"A flaw was found in the nvme-tcp module of the Linux kernel. This vulnerability arises from improper handling of C2HData for REQ_OP_WRITE_ZEROES commands, where the system fails to adequately validate the data length. A remote attacker cou…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-787","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T17:58:49+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89482.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89482.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89482"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532128"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89482"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89482"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89482.mbox"},{"url":"https://git.kernel.org/stable/c/32ea8ce96b9bd797c59c351ce490ffd97adaa8c0"},{"url":"https://git.kernel.org/stable/c/dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab"},{"url":"https://git.kernel.org/stable/c/7ed0b61bbc145988be292c4d3ec580aebd8d2bcd"},{"url":"https://git.kernel.org/stable/c/b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528"},{"url":"https://git.kernel.org/stable/c/b36161701cb366f416afdcf70771d432a7c74753"},{"url":"https://git.kernel.org/stable/c/6a01b58263108eaf9869bb6f82f07709240c6589"},{"url":"https://git.kernel.org/stable/c/641ad3a30ba560f0a9a610376c568d7b75d2a2aa"},{"url":"https://git.kernel.org/stable/c/3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00704,"epssPercentile":0.51477,"scores":{"vendor":7,"cna":9.8},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89482","body":"## Overview\n\nA flaw was found in the nvme-tcp module of the Linux kernel. This vulnerability arises from improper handling of C2HData for REQ_OP_WRITE_ZEROES commands, where the system fails to adequately validate the data length. A remote attacker could exploit this by sending specially crafted C2HData, leading to a wild-memory-access. This memory corruption can cause a kernel crash, resulting in a Denial of Service (DoS) for the affected system.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, 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 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89482.json)\n\n**kernel: nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\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 8\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\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":205538,"id":"CVE-2026-89482","ts":1789576724446,"field":"cvss","old":"9.8","new":"7"},{"seq":205537,"id":"CVE-2026-89482","ts":1789576724446,"field":"severity","old":"critical","new":"high"},{"seq":198026,"id":"CVE-2026-89482","ts":1789384321447,"field":"cvss","old":"5.9","new":"9.8"},{"seq":198025,"id":"CVE-2026-89482","ts":1789384321447,"field":"severity","old":"medium","new":"critical"},{"seq":183792,"id":"CVE-2026-89482","ts":1789356677409,"field":"cvss","old":"9.8","new":"5.9"},{"seq":183791,"id":"CVE-2026-89482","ts":1789356677409,"field":"severity","old":"critical","new":"medium"},{"seq":153264,"id":"CVE-2026-89482","ts":1789285349796,"field":"cvss","old":null,"new":"9.8"},{"seq":153263,"id":"CVE-2026-89482","ts":1789285349796,"field":"severity","old":"none","new":"critical"},{"seq":147784,"id":"CVE-2026-89482","ts":1789270212277,"field":"cvss","old":null,"new":"5.9"},{"seq":147783,"id":"CVE-2026-89482","ts":1789270212277,"field":"severity","old":"none","new":"medium"},{"seq":109534,"id":"CVE-2026-89482","ts":1789183732316,"field":"cvss","old":null,"new":"5.9"},{"seq":109533,"id":"CVE-2026-89482","ts":1789183732316,"field":"severity","old":"none","new":"medium"}]}