138 lines
7.7 KiB
JSON
138 lines
7.7 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-2026-53172",
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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": "2026-06-25T08:38:50.056Z",
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"dateUpdated": "2026-08-05T12:33:41.473Z"
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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": "2026-08-05T12:33:41.473Z"
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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 IFM region index out-of-bounds in command stream parser\n\nNPU_SET_IFM_REGION extracts the region index with param & 0x7f, giving\na maximum value of 127. However region_size[] and output_region[] in\nstruct ethosu_validated_cmdstream_info are both sized to\nNPU_BASEP_REGION_MAX (8), giving valid indices [0..7].\n\nEvery other region assignment in the same switch uses param & 0x7:\n NPU_SET_OFM_REGION: st.ofm.region = param & 0x7;\n NPU_SET_IFM2_REGION: st.ifm2.region = param & 0x7;\n NPU_SET_WEIGHT_REGION: st.weight[0].region = param & 0x7;\n NPU_SET_SCALE_REGION: st.scale[0].region = param & 0x7;\n\nThe 0x7f mask on IFM is inconsistent and appears to be a typo.\n\nfeat_matrix_length() and calc_sizes() use the region index directly\nas an array subscript into the kzalloc'd info struct:\n info->region_size[fm->region] = max(...);\n\nA userspace caller supplying NPU_SET_IFM_REGION with param > 7 causes\na write up to 127*8 = 1016 bytes past the start of region_size[],\ncorrupting adjacent kernel heap data.\n\nFix by applying the same & 0x7 mask used by all other region\nassignments."
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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: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 parser is reached through the local DRM accel ioctl DRM_IOCTL_ETHOSU_CMDSTREAM_BO_CREATE on /dev/accel/accel*, with the command stream supplied from a userspace pointer.\nAC:L - A crafted command stream can directly set an IFM region index above 7 and then trigger size calculation; no race or condition outside attacker control is required.\nPR:L - The attacker needs local access to the Ethos-U accel device node as an unprivileged userspace client, but the ioctl has no CAP_SYS_ADMIN, DRM_MASTER, or DRM_AUTH gate.\nUI:N - No victim action is required beyond the attacker issuing the ioctl with a malformed command stream.\nS:U - The bug is standard kernel heap memory corruption reachable from a local kernel device interface and does not cross a VM, IOMMU, or separate security authority boundary.\nC:H - The out-of-bounds region_size access performs an 8-byte heap read during max() and memory corruption can plausibly be leveraged for kernel information disclosure.\nI:H - The bug performs an out-of-bounds 8-byte heap write up to roughly 1KB beyond the allocated validation info object with attacker-influenced command stream values.\nA:H - The same out-of-bounds heap corruption can readily crash or destabilize the kernel, and repeated local triggering is straightforward."
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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": "ee7bed779def61ebff1b92b0e851f412176fa416",
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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": "00f547e0dfecf83014fb32bcba587c6b684c1362",
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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/ee7bed779def61ebff1b92b0e851f412176fa416"
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},
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{
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"url": "https://git.kernel.org/stable/c/00f547e0dfecf83014fb32bcba587c6b684c1362"
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}
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],
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"title": "accel/ethosu: fix IFM region index out-of-bounds in command stream parser",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |