440 lines
21 KiB
JSON
440 lines
21 KiB
JSON
{
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-31768",
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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": "2026-03-09T15:48:24.140Z",
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"datePublished": "2026-05-01T14:14:57.971Z",
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"dateUpdated": "2026-11-10T12:45:43.839Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:25:01.435Z"
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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\niio: adc: ti-adc161s626: use DMA-safe memory for spi_read()\n\nAdd a DMA-safe buffer and use it for spi_read() instead of a stack\nmemory. All SPI buffers must be DMA-safe.\n\nSince we only need up to 3 bytes, we just use a u8[] instead of __be16\nand __be32 and change the conversion functions appropriately."
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}
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"metrics": [
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{
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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:H/A:H",
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"baseScore": 7.8,
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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 vulnerable `spi_read()` is reachable by a local user reading the world-readable IIO raw sysfs attribute for the ADC device. There is no network or adjacent protocol path to this hardware-specific SPI ADC driver.\nAC:L - On an affected system with this ADC behind a DMA-capable SPI controller, the attacker can repeatedly trigger the vulnerable read directly; no race or external condition beyond the deployment is required.\nPR:L - Triggering the direct IIO raw read requires only a basic local unprivileged user able to read sysfs device attributes. No real root/admin capability is required for that path.\nUI:N - The attacker can trigger the read themselves by accessing the sysfs attribute. No victim action is needed.\nS:U - The corruption occurs within the kernel context managing the SPI/IIO device. It does not cross a separate security authority such as a guest/host or IOMMU isolation boundary.\nC:H - The bug passes kernel stack memory as a DMA receive buffer, creating kernel stack/cacheline memory corruption on DMA-capable controllers. Kernel stack corruption is reasonably exploitable for broader kernel memory disclosure.\nI:H - DMA into non-DMA-safe stack memory can corrupt adjacent kernel stack state and potentially control data or control flow. Under the required high-severity tie-break, this supports high integrity impact.\nA:H - Kernel stack corruption from repeated ADC reads can cause oopses, panics, or hangs. Availability impact is therefore high."
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}
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