201 lines
11 KiB
JSON
201 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-72089",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-09T03:40:39.905Z",
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"datePublished": "2026-08-15T05:52:36.800Z",
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"dateUpdated": "2026-08-17T05:40:09.108Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T05:40:09.108Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "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)."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 7.1,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/accel/ivpu/ivpu_fw_log.c"
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],
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"versions": [
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{
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"version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
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"lessThan": "5592a207e158b738d9c1d27f208dbbea13ae7606",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
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"lessThan": "dc9a1cda2e46d0254730a6f93cfe48532895f33c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
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"lessThan": "257321a1c036da417f5d9c47b95c7e58f62bf263",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d4e4257afa6ed5205eda993180401fc2c20e4b60",
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"lessThan": "6920e62be4c969a68ce4ebc59da68c6cbc9512e5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "ddb44baed257560f192b145ed36cf8c0a412de47",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/accel/ivpu/ivpu_fw_log.c"
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],
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"versions": [
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{
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"version": "6.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.148",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.97",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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"operator": "OR",
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"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "6.6.148"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/5592a207e158b738d9c1d27f208dbbea13ae7606"
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},
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{
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"url": "https://git.kernel.org/stable/c/dc9a1cda2e46d0254730a6f93cfe48532895f33c"
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},
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{
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"url": "https://git.kernel.org/stable/c/257321a1c036da417f5d9c47b95c7e58f62bf263"
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},
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{
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"url": "https://git.kernel.org/stable/c/6920e62be4c969a68ce4ebc59da68c6cbc9512e5"
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},
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{
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"url": "https://git.kernel.org/stable/c/ddb44baed257560f192b145ed36cf8c0a412de47"
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}
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],
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"title": "accel/ivpu: Reject firmware log with size smaller than header",
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