{"api_version":"1","generated_at":"2026-08-17T10:18:36+00:00","cve":"CVE-2026-72089","urls":{"html":"https://cve.report/CVE-2026-72089","api":"https://cve.report/api/cve/CVE-2026-72089.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72089","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72089"},"summary":{"title":"accel/ivpu: Reject firmware log with size smaller than header","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Reject firmware log with size smaller than header\n\nfw_log_from_bo() validates the tracing buffer header_size and that the\nlog fits within the BO, but never checks that log->size is at least\nlog->header_size. fw_log_print_buffer() then computes:\n\n  u32 data_size = log->size - log->header_size;\n\nwhich underflows to a near-U32_MAX value when firmware reports a log whose\nsize is smaller than its header. That huge data_size defeats the\nlog_start/log_end bounds clamps added by commit dd1311bcf0e6 (\"accel/ivpu:\nAdd bounds checks for firmware log indices\"), so fw_log_print_lines() reads\nfar past the small real data region of the BO. A size of 0 also makes\nfw_log_from_bo() advance the offset by 0, causing the callers to loop\nforever on the same header.\n\nReject logs whose size is smaller than the header (which also rejects\nsize == 0).","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:21:22","updated_at":"2026-08-17 06:18:07"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/dc9a1cda2e46d0254730a6f93cfe48532895f33c","name":"https://git.kernel.org/stable/c/dc9a1cda2e46d0254730a6f93cfe48532895f33c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ddb44baed257560f192b145ed36cf8c0a412de47","name":"https://git.kernel.org/stable/c/ddb44baed257560f192b145ed36cf8c0a412de47","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5592a207e158b738d9c1d27f208dbbea13ae7606","name":"https://git.kernel.org/stable/c/5592a207e158b738d9c1d27f208dbbea13ae7606","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/257321a1c036da417f5d9c47b95c7e58f62bf263","name":"https://git.kernel.org/stable/c/257321a1c036da417f5d9c47b95c7e58f62bf263","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6920e62be4c969a68ce4ebc59da68c6cbc9512e5","name":"https://git.kernel.org/stable/c/6920e62be4c969a68ce4ebc59da68c6cbc9512e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72089","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72089","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d4e4257afa6ed5205eda993180401fc2c20e4b60 5592a207e158b738d9c1d27f208dbbea13ae7606 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d4e4257afa6ed5205eda993180401fc2c20e4b60 dc9a1cda2e46d0254730a6f93cfe48532895f33c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d4e4257afa6ed5205eda993180401fc2c20e4b60 257321a1c036da417f5d9c47b95c7e58f62bf263 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d4e4257afa6ed5205eda993180401fc2c20e4b60 6920e62be4c969a68ce4ebc59da68c6cbc9512e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72089","cve":"CVE-2026-72089","epss":"0.002090000","percentile":"0.113540000","score_date":"2026-08-16","updated_at":"2026-08-17 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the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Reject firmware log with size smaller than header\n\nfw_log_from_bo() validates the tracing buffer header_size and that the\nlog fits within the BO, but never checks that log->size is at least\nlog->header_size. fw_log_print_buffer() then computes:\n\n  u32 data_size = log->size - log->header_size;\n\nwhich underflows to a near-U32_MAX value when firmware reports a log whose\nsize is smaller than its header. That huge data_size defeats the\nlog_start/log_end bounds clamps added by commit dd1311bcf0e6 (\"accel/ivpu:\nAdd bounds checks for firmware log indices\"), so fw_log_print_lines() reads\nfar past the small real data region of the BO. A size of 0 also makes\nfw_log_from_bo() advance the offset by 0, causing the callers to loop\nforever on the same header.\n\nReject logs whose size is smaller than the header (which also rejects\nsize == 0)."}],"metrics":[{"cvssV3_1":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The bug is in Intel NPU (ivpu) firmware log parsing reached only via local debugfs reads/writes or automatic driver recovery/coredump paths after submitting work through the DRM render node; there is no network-facing entry point.\nAC:L - An unprivileged local user can repeatedly submit NPU jobs to provoke firmware faults/timeouts that leave malformed tracing headers and then reliably trigger kernel log parsing during recovery, coredump, or fw_log access without depending on uncontrollable timing or layout.\nPR:L - Exploitation requires only standard local access to the Intel NPU DRM render node to submit inference jobs and provoke recovery; it does not require root/CAP_SYS_ADMIN, and the device is not reachable from unprivileged user namespaces.\nUI:N - No victim interaction is required; the attacker triggers malformed firmware log processing themselves via job submission and the resulting automatic recovery/coredump path or by reading debugfs fw_log.\nS:U - Impact is confined to kernel memory and availability on the same host running the ivpu driver; it does not cross VM, container, or IOMMU security boundaries.\nC:H - Integer underflow makes data_size wrap to ~U32_MAX, bypassing index clamps so fw_log_print_lines performs a massive out-of-bounds read past the tracing BO and can disclose adjacent kernel memory via drm_printf/coredump output.\nI:N - The flaw is an out-of-bounds read and possible infinite loop during parsing; it does not provide an arbitrary kernel write, code execution, or other integrity-modifying primitive.\nA:H - A near-U32_MAX read can oops/panic the kernel when accessing unmapped memory, and log size 0 prevents offset advancement causing an infinite loop in fw_log_print_all_in_bo during coredump, reset, or debugfs access, hanging the system."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:40:09.108Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5592a207e158b738d9c1d27f208dbbea13ae7606"},{"url":"https://git.kernel.org/stable/c/dc9a1cda2e46d0254730a6f93cfe48532895f33c"},{"url":"https://git.kernel.org/stable/c/257321a1c036da417f5d9c47b95c7e58f62bf263"},{"url":"https://git.kernel.org/stable/c/6920e62be4c969a68ce4ebc59da68c6cbc9512e5"},{"url":"https://git.kernel.org/stable/c/ddb44baed257560f192b145ed36cf8c0a412de47"}],"title":"accel/ivpu: Reject firmware log with size smaller than header","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72089","datePublished":"2026-08-15T05:52:36.800Z","dateReserved":"2026-08-09T03:40:39.905Z","dateUpdated":"2026-08-17T05:40:09.108Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:21:22","lastModifiedDate":"2026-08-17 06:18:07","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72089","Ordinal":"1","Title":"accel/ivpu: Reject firmware log with size smaller than header","CVE":"CVE-2026-72089","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72089","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Reject firmware log with size smaller than header\n\nfw_log_from_bo() validates the tracing buffer header_size and that the\nlog fits within the BO, but never checks that log->size is at least\nlog->header_size. fw_log_print_buffer() then computes:\n\n  u32 data_size = log->size - log->header_size;\n\nwhich underflows to a near-U32_MAX value when firmware reports a log whose\nsize is smaller than its header. That huge data_size defeats the\nlog_start/log_end bounds clamps added by commit dd1311bcf0e6 (\"accel/ivpu:\nAdd bounds checks for firmware log indices\"), so fw_log_print_lines() reads\nfar past the small real data region of the BO. A size of 0 also makes\nfw_log_from_bo() advance the offset by 0, causing the callers to loop\nforever on the same header.\n\nReject logs whose size is smaller than the header (which also rejects\nsize == 0).","Type":"Description","Title":"accel/ivpu: Reject firmware log with size smaller than header"}]}}}