{"id":"CVE-2026-98145","title":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: reject a command chain that carries no commands\n\nA chain whose command_count is zero passes the payload length check,\nbecause struct_size(payload, data, …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: reject a command chain that carries no commands\n\nA chain whose command_count is zero passes the payload length check,\nbecause struct_size(payload, data, …","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","cwe":["CWE-125"],"vendor":"Linux","product":"Linux","affected":["Linux >= 8ed8b02396172b137ca8c78c3cb999ddf4fb0bbf < ed74e8d603df457bfcf16ed4f8f1660a1525759e","Linux >= 8ed8b02396172b137ca8c78c3cb999ddf4fb0bbf < ef6d27af71e1dc43181ec797a6aaa77c27c36786","Linux 7.1"],"published":"2026-09-25","updated":"2026-09-30","sourceUpdated":"2026-09-30T14:10:59.253","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98145","references":[{"url":"https://git.kernel.org/stable/c/ed74e8d603df457bfcf16ed4f8f1660a1525759e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ef6d27af71e1dc43181ec797a6aaa77c27c36786","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98145.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98145"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541322"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98145"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98145"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98145.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.001,"epssPercentile":0.00831,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.808Z","slug":"CVE-2026-98145","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: reject a command chain that carries no commands\n\nA chain whose command_count is zero passes the payload length check,\nbecause struct_size(payload, data, 0) is just the header. The fill loop\nthen does not run, so offset stays zero and the request is submitted with\na zero-length buffer.\n\nOn firmware without AIE2_NPU_COMMAND that ends at the opcode check, since\nop is still ERT_INVALID_CMD and aie2_get_chain_msg_op() answers\nMSG_OP_MAX_OPCODE. aie2_get_npu_chain_msg_op() answers\nMSG_OP_CHAIN_EXEC_NPU whatever it is given, so there the submission\ncontinues to drm_clflush_virt_range(cmd_buf, 0), which reads the byte\nbefore the buffer and faults on the vmap guard page. EXEC_CMD is\nreachable by any process that can open the render node.\n\nReject the request instead.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-28 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98145.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212583,"id":"CVE-2026-98145","ts":1790668215551,"field":"cvss","old":null,"new":"5.5"},{"seq":212582,"id":"CVE-2026-98145","ts":1790668215551,"field":"severity","old":"none","new":"medium"}]}