{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-38667",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T04:51:24.031Z",
        "datePublished": "2025-08-22T16:02:58.865Z",
        "dateUpdated": "2026-08-05T12:03:50.401Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:03:50.401Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: fix potential out-of-bound write\n\nThe buffer is set to 20 characters. If a caller write more characters,\ncount is truncated to the max available space in \"simple_write_to_buffer\".\nTo protect from OoB access, check that the input size fit into buffer and\nadd a zero terminator after copy to the end of the copied data."
                }
            ],
            "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 bug is triggered by a plain write(2) syscall on the debugfs file /sys/kernel/debug/iio/<dev>/direct_reg_access, which requires local access to the system. There is no network-facing path to iio_debugfs_write_reg.\nAC:L - A single write() with an oversized count and a 79-byte userspace buffer deterministically produces the out-of-bounds write; the attacker fully controls the offset (80 up to MAX_RW_COUNT) with no race, no memory-layout dependency, and no retries needed.\nPR:L - Reaching the node needs only local access to a mounted debugfs, whose IIO sensor nodes are routinely relaxed to service/HAL accounts on Android, embedded and industrial deployments where IIO drivers live; consistent with prior kernel-CNA scoring of debugfs-reachable memory-safety bugs (CVE-2026-43380, CVE-2026-46190) this is Low rather than High.\nUI:N - The attacker performs the entire attack themselves with an open() plus write() on an already-present debugfs node; no victim action, mount, or file-open by another user is required.\nS:U - The corruption is confined to kernel memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The attacker-controlled NUL write into the kernel stack can zero bytes of saved pointers, length, or index fields in adjacent frames, which is leverageable into arbitrary kernel-memory disclosure; per guidance, memory corruption exploitable for info disclosure scores High.\nI:H - This is a genuine out-of-bounds write with a fully attacker-controlled offset, allowing a zero byte to be placed over saved return addresses, stack canary bytes, or (without VMAP_STACK) adjacent kernel heap data, giving a control-flow-hijack primitive.\nA:H - Large count values drive the write into the VMAP_STACK guard page or corrupt saved stack state, producing an oops, double fault, or panic that can be triggered repeatedly."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/iio/industrialio-core.c"
                    ],
                    "versions": [
                        {
                            "version": "6d5dd486c715908b5a6ed02315a15ff044a91025",
                            "lessThan": "81a635b6eccd6fc889f6d07ab9583b705f739ce1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6d5dd486c715908b5a6ed02315a15ff044a91025",
                            "lessThan": "16285a0931869baa618b1f5d304e1e9d090470a8",
                            "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/iio/industrialio-core.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.9",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16",
                            "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": "6.15",
                                    "versionEndExcluding": "6.15.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "6.16"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/81a635b6eccd6fc889f6d07ab9583b705f739ce1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/16285a0931869baa618b1f5d304e1e9d090470a8"
                }
            ],
            "title": "iio: fix potential out-of-bound write",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}