197 lines
11 KiB
JSON
197 lines
11 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2025-38484",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2025-04-16T04:51:24.021Z",
|
|
"datePublished": "2025-07-28T11:21:48.690Z",
|
|
"dateUpdated": "2026-08-05T12:02:16.576Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:02:16.576Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: backend: fix out-of-bound write\n\nThe buffer is set to 80 character. If a caller write more characters,\ncount is truncated to the max available space in \"simple_write_to_buffer\".\nBut afterwards a string terminator is written to the buffer at offset count\nwithout boundary check. The zero termination is written OUT-OF-BOUND.\n\nAdd a check that the given buffer is smaller then the buffer to prevent."
|
|
}
|
|
],
|
|
"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 code is reached only by a local `write(2)`/`pwrite(2)` on the debugfs file `/sys/kernel/debug/iio/iio:deviceN/backendM/direct_reg_access`. There is no network or remote data path into `iio_backend_debugfs_write_reg()`.\nAC:L - A single `write()` with any length ≥ 80 deterministically executes `buf[count] = '\\0'` out of bounds, and the attacker directly chooses the corruption offset via the syscall length. No race, no memory-layout precondition, and no unpredictable state is involved.\nPR:L - The debugfs node is created 0600, but debugfs on industrial/embedded IIO deployments is routinely mounted and permission-relaxed for instrumentation tooling, making the write reachable by an unprivileged local account; consistent with this CNA's scoring of comparable debugfs memory-corruption bugs (CVE-2026-43380, CVE-2026-46190). Choosing the higher-severity option where reachability depends on deployment configuration.\nUI:N - The attacker triggers the bug entirely on their own with one write syscall against an already-present device node. No action by any other user or administrator is required.\nS:U - The out-of-bounds write corrupts kernel memory within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - Attacker-controlled stack corruption at a chosen offset can truncate saved pointers and length/size fields, which is readily leveraged into kernel memory disclosure, and full kernel compromise implies unrestricted read of system memory.\nI:H - This is a direct out-of-bounds write with an attacker-chosen offset spanning the kernel stack (return addresses, saved registers, stack canary) and, on non-VMAP_STACK builds, adjacent lowmem — a NUL-byte poisoning primitive usable for control-flow hijack and privilege escalation.\nA:H - Overwriting the stack canary, a return address, or hitting the VMAP_STACK guard page with a large offset causes an immediate kernel panic/oops, and the write can be repeated at will."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"drivers/iio/industrialio-backend.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "df3892e5e861c43d5612728ed259634675b8a71f",
|
|
"lessThan": "6eea9f7648ddb9e4903735a1f77cf196c957aa38",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "035b4989211dc1c8626e186d655ae8ca5141bb73",
|
|
"lessThan": "01e941aa7f5175125df4ac5d3aab099961525602",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "035b4989211dc1c8626e186d655ae8ca5141bb73",
|
|
"lessThan": "da9374819eb3885636934c1006d450c3cb1a02ed",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "04271a4d2740f98bbe36f82cd3d74677a839d1eb",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "fd791c81f410ab1c554686a6f486dc7a176dfe35",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "6.12.23",
|
|
"lessThan": "6.12.40",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.13.11",
|
|
"lessThan": "6.14",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.14.2",
|
|
"lessThan": "6.15",
|
|
"status": "affected",
|
|
"versionType": "semver"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"drivers/iio/industrialio-backend.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "6.15",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.15",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.40",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.15.8",
|
|
"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": "6.12.23",
|
|
"versionEndExcluding": "6.12.40"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.15",
|
|
"versionEndExcluding": "6.15.8"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.15",
|
|
"versionEndExcluding": "6.16"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.13.11"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.14.2"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/6eea9f7648ddb9e4903735a1f77cf196c957aa38"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/01e941aa7f5175125df4ac5d3aab099961525602"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/da9374819eb3885636934c1006d450c3cb1a02ed"
|
|
}
|
|
],
|
|
"title": "iio: backend: fix out-of-bound write",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |