138 lines
7.6 KiB
JSON
138 lines
7.6 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-2026-53171",
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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": "2026-06-09T07:44:35.389Z",
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"datePublished": "2026-06-25T08:38:49.392Z",
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"dateUpdated": "2026-08-05T12:33:40.393Z"
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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": "2026-08-05T12:33:40.393Z"
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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/ethosu: fix arithmetic issues in dma_length()\n\ndma_length() derives DMA region usage from command stream values and\nupdates region_size[]:\n\n len = ((len + stride[0]) * size0 + stride[1]) * size1\n region_size[region] = max(..., len + dma->offset)\n\nSeveral arithmetic issues can corrupt the derived region size:\n\n- signed stride values may underflow when added to len\n- intermediate multiplications may overflow\n- len + dma->offset may overflow during region_size updates\n- dma_length() error returns were not validated by the caller\n\nregion_size[] is later used by ethosu_job.c to validate command stream\naccesses against GEM buffer sizes. Arithmetic wraparound can therefore\nunder-report region usage and bypass the bounds validation.\n\nFix by validating signed additions, using overflow helpers for\nmultiplications and offset updates, and propagating dma_length()\nfailures to the caller."
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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:C/C:H/I:H/A:H",
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"baseScore": 8.8,
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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 path is reached through local DRM accel ioctls on the Ethos-U device, via user-supplied command stream creation and job submission.\nAC:L - The attacker controls the command stream fields that trigger the arithmetic wraparound, and no race or external state is required beyond access to an affected Ethos-U device.\nPR:L - No kernel capability check is present on the relevant driver ioctls, but exploitation requires a local unprivileged process able to open the accel device node.\nUI:N - After local device access, the attacker can create buffers and submit the malicious command stream directly without victim interaction.\nS:C - The validation bypass can let NPU DMA access memory outside the intended GEM buffer, crossing the intended DMA/object isolation boundary and potentially affecting kernel or other-process memory.\nC:H - An out-of-bounds DMA source can copy memory outside the attacker’s buffer into an attacker-readable destination buffer, giving a plausible high-impact memory disclosure primitive.\nI:H - An out-of-bounds DMA destination can write outside the validated GEM buffer, giving a plausible high-impact memory corruption primitive.\nA:H - Out-of-bounds DMA can corrupt system memory or trigger bus/device faults and scheduler resets, with a plausible kernel crash or system-level denial of service."
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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/ethosu/ethosu_gem.c"
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],
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"versions": [
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{
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"version": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b",
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"lessThan": "6bb73845d1855ceaf50e397175e5979a7bdf69bc",
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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": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b",
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"lessThan": "ee6d9b6e51626f259c6f0e38d94f91be4fd14754",
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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/ethosu/ethosu_gem.c"
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],
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"versions": [
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{
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"version": "6.19",
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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": "6.19",
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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": "7.0.13",
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"lessThanOrEqual": "7.0.*",
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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",
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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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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.19",
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"versionEndExcluding": "7.0.13"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.19",
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"versionEndExcluding": "7.1"
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}
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]
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}
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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/6bb73845d1855ceaf50e397175e5979a7bdf69bc"
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},
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{
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"url": "https://git.kernel.org/stable/c/ee6d9b6e51626f259c6f0e38d94f91be4fd14754"
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}
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],
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"title": "accel/ethosu: fix arithmetic issues in dma_length()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |