{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53172", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.389Z", "datePublished": "2026-06-25T08:38:50.056Z", "dateUpdated": "2026-06-25T08:38:50.056Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:38:50.056Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/accel/ethosu/ethosu_gem.c"], "versions": [{"version": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b", "lessThan": "ee7bed779def61ebff1b92b0e851f412176fa416", "status": "affected", "versionType": "git"}, {"version": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b", "lessThan": "00f547e0dfecf83014fb32bcba587c6b684c1362", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/accel/ethosu/ethosu_gem.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ee7bed779def61ebff1b92b0e851f412176fa416"}, {"url": "https://git.kernel.org/stable/c/00f547e0dfecf83014fb32bcba587c6b684c1362"}], "title": "accel/ethosu: fix IFM region index out-of-bounds in command stream parser", "x_generator": {"engine": "bippy-1.2.0"}}}}

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