{"id":"CVE-2026-97916","title":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Validate firmware log buffer metadata\n\nThe tracing log headers parsed by fw_log_print_buffer() reside in\nDMA-shared BOs that the NPU firmware can write to.\n…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Validate firmware log buffer metadata\n\nThe tracing log headers parsed by fw_log_print_buffer() reside in\nDMA-shared BOs that the NPU firmware can write to.\n…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= d4e4257afa6ed5205eda993180401fc2c20e4b60 < 8ec3d6972f1440fae6c8dadd1859892775208759","Linux >= d4e4257afa6ed5205eda993180401fc2c20e4b60 < 40868f80a89199630b03d4457876f9a1feba0660","Linux >= d4e4257afa6ed5205eda993180401fc2c20e4b60 < b1555f63ee1a680f280bc18e8dac416f250e2ec3","Linux >= d4e4257afa6ed5205eda993180401fc2c20e4b60 < 0724afc55c77c36c7feb9a7264b02aa7593c5c2d","Linux 6.6"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:18.593","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97916","references":[{"url":"https://git.kernel.org/stable/c/0724afc55c77c36c7feb9a7264b02aa7593c5c2d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/40868f80a89199630b03d4457876f9a1feba0660","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8ec3d6972f1440fae6c8dadd1859892775208759","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b1555f63ee1a680f280bc18e8dac416f250e2ec3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97916.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97916"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541156"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97916"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97916"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97916.mbox"},{"url":"https://git.kernel.org/stable/c/07d4190d75021c38b7994045179aa29131634d4f"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-25T11:06:38.889Z","epss":0.00201,"epssPercentile":0.09838,"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-367"],"slug":"CVE-2026-97916","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Validate firmware log buffer metadata\n\nThe tracing log headers parsed by fw_log_print_buffer() reside in\nDMA-shared BOs that the NPU firmware can write to.\n\nfw_log_from_bo() validated log->header_size and log->size, but\nfw_log_print_buffer() re-read those same fields from shared memory\nafterwards, allowing a TOCTOU where firmware changes them between the\ncheck and the use, and making the host dereference out-of-bounds\naddresses while printing logs.\n\nSnapshot the validated values once with READ_ONCE() and pass them down\nexplicitly in a new struct ivpu_fw_log_desc instead of re-reading them\nfrom the shared struct.\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 · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97916.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213489,"id":"CVE-2026-97916","ts":1790754738976,"field":"cvss","old":null,"new":"5.5"},{"seq":213488,"id":"CVE-2026-97916","ts":1790754738976,"field":"severity","old":"none","new":"medium"}]}