159 lines
8.5 KiB
JSON
159 lines
8.5 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-2025-68167",
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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": "2025-12-16T13:41:40.250Z",
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"datePublished": "2025-12-16T13:42:47.480Z",
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"dateUpdated": "2026-08-05T12:09:56.647Z"
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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": "2026-08-05T12:09:56.647Z"
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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\ngpiolib: fix invalid pointer access in debugfs\n\nIf the memory allocation in gpiolib_seq_start() fails, the s->private\nfield remains uninitialized and is later dereferenced without checking\nin gpiolib_seq_stop(). Initialize s->private to NULL before calling\nkzalloc() and check it before dereferencing it."
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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 vulnerability is reached only by reading the local debugfs file /sys/kernel/debug/gpio; there is no network or remote path into gpiolib's seq_file handlers.\nAC:L - The attacker fully controls both required conditions — memory pressure to make the small GFP_KERNEL kzalloc fail, and unbounded repetition of read()/lseek() on the file, each of which drives multiple start/stop cycles — so the failure can simply be retried until it lands.\nPR:L - The gpio debugfs file is explicitly created world-readable (mode 0444) and needs no capability, so any unprivileged local user reaches it on the many embedded, automotive, industrial and Android deployments that mount debugfs traversable (mode=755 or uid/gid options), which is common precisely because GPIO debugging is the reason debugfs is mounted there.\nUI:N - The attacker triggers the bug entirely through their own read() calls on the debugfs file; no action by any other user or victim process is needed.\nS:U - The corruption stays within the kernel's own security authority — freed slab memory and per-CPU SRCU counters — with no crossing of a VM, IOMMU or sandbox boundary.\nC:H - gpiolib_seq_stop() reads priv->idx out of an already-freed kmalloc-16 object, and the accompanying double free corrupts the slab freelist, enabling overlapping allocations that yield arbitrary kernel memory disclosure.\nI:H - The stale idx is fed unvalidated into __srcu_read_unlock(), producing this_cpu_inc() at an attacker-influenced out-of-bounds offset from the per-CPU srcu_data, and the subsequent kfree() of an object owned by another allocation is a classic double-free write primitive.\nA:H - On the first iteration s->private is NULL, so gpiolib_seq_stop() dereferences NULL and oopses; on later iterations the use-after-free, wild per-CPU increment and double free reliably panic the kernel."
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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/gpio/gpiolib.c"
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],
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"versions": [
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{
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"version": "e348544f7994d252427ed3ae637c7081cbb90f66",
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"lessThan": "70180a6031056096c93ed2f47c41803268bdd91c",
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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": "e348544f7994d252427ed3ae637c7081cbb90f66",
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"lessThan": "3c91c8f424d3e44c8645ab765a38773e58afb07d",
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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": "e348544f7994d252427ed3ae637c7081cbb90f66",
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"lessThan": "2f6115ad8864cf3f48598f26c74c7c8e5c391919",
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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/gpio/gpiolib.c"
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],
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"versions": [
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{
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"version": "6.9",
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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": "6.9",
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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": "6.12.58",
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"lessThanOrEqual": "6.12.*",
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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": "6.17.8",
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"lessThanOrEqual": "6.17.*",
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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": "6.18",
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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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"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": "6.9",
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"versionEndExcluding": "6.12.58"
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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": "6.9",
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"versionEndExcluding": "6.17.8"
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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": "6.9",
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"versionEndExcluding": "6.18"
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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/70180a6031056096c93ed2f47c41803268bdd91c"
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},
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{
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"url": "https://git.kernel.org/stable/c/3c91c8f424d3e44c8645ab765a38773e58afb07d"
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},
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{
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"url": "https://git.kernel.org/stable/c/2f6115ad8864cf3f48598f26c74c7c8e5c391919"
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}
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],
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"title": "gpiolib: fix invalid pointer access in debugfs",
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