CVE-2026-53172

{"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": "2026-08-05T12:33:41.473Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:33:41.473Z"}, "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "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."}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/accel/ethosu/ethosu_gem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ee7bed779def61ebff1b92b0e851f412176fa416", "status": "affected", "version": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b", "versionType": "git"}, {"lessThan": "00f547e0dfecf83014fb32bcba587c6b684c1362", "status": "affected", "version": "5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/accel/ethosu/ethosu_gem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E", "versionEndExcluding": "7.0.13", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*", "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*", "matchCriteriaId": "81DFF19E-9CF8-49C6-8C36-1E4038622933", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*", "matchCriteriaId": "B0E8FC71-3952-444C-83E9-718DBBBEC615", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}], "id": "CVE-2026-53172", "lastModified": "2026-07-06T18:23:42.853", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-06-25T09:16:34.550", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/00f547e0dfecf83014fb32bcba587c6b684c1362"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ee7bed779def61ebff1b92b0e851f412176fa416"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: accel/ethosu: fix IFM region index out-of-bounds in command stream parser", "id": "2492781", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492781"}, "csaw": false, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel's accel/ethosu component. An incorrect mask used when processing the NPU_SET_IFM_REGION command allows a local userspace caller to provide an out-of-bounds region index. This can lead to an out-of-bounds write, corrupting adjacent kernel heap data."], "name": "CVE-2026-53172", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53172\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53172\nhttps://lore.kernel.org/linux-cve-announce/2026062552-CVE-2026-53172-11a3@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b,ee7bed779def61ebff1b92b0e851f412176fa416)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b,00f547e0dfecf83014fb32bcba587c6b684c1362)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.13,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-25T10:45:16.603970+00:00", "updated": "2026-08-13T13:45:03.834628+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-125", "CWE-1285"]}