138 lines
7.5 KiB
JSON
138 lines
7.5 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-2025-38667",
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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": "2025-04-16T04:51:24.031Z",
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"datePublished": "2025-08-22T16:02:58.865Z",
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"dateUpdated": "2026-08-05T12:03:50.401Z"
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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": "2026-08-05T12:03:50.401Z"
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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\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."
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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 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."
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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/iio/industrialio-core.c"
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],
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"versions": [
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{
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"version": "6d5dd486c715908b5a6ed02315a15ff044a91025",
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"lessThan": "81a635b6eccd6fc889f6d07ab9583b705f739ce1",
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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": "6d5dd486c715908b5a6ed02315a15ff044a91025",
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"lessThan": "16285a0931869baa618b1f5d304e1e9d090470a8",
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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/iio/industrialio-core.c"
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],
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"versions": [
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{
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"version": "6.15",
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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": "6.15",
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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": "6.15.9",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.15.9"
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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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]
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/81a635b6eccd6fc889f6d07ab9583b705f739ce1"
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},
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{
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"url": "https://git.kernel.org/stable/c/16285a0931869baa618b1f5d304e1e9d090470a8"
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}
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],
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"title": "iio: fix potential out-of-bound write",
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"x_generator": {
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