269 lines
14 KiB
JSON
269 lines
14 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2025-38257",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2025-04-16T04:51:23.997Z",
|
|
"datePublished": "2025-07-09T10:42:34.395Z",
|
|
"dateUpdated": "2026-10-15T21:52:12.939Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:00:47.634Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pkey: Prevent overflow in size calculation for memdup_user()\n\nNumber of apqn target list entries contained in 'nr_apqns' variable is\ndetermined by userspace via an ioctl call so the result of the product in\ncalculation of size passed to memdup_user() may overflow.\n\nIn this case the actual size of the allocated area and the value\ndescribing it won't be in sync leading to various types of unpredictable\nbehaviour later.\n\nUse a proper memdup_array_user() helper which returns an error if an\noverflow is detected. Note that it is different from when nr_apqns is\ninitially zero - that case is considered valid and should be handled in\nsubsequent pkey_handler implementations.\n\nFound by Linux Verification Center (linuxtesting.org)."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
|
|
"baseScore": 7.3,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:L - The vulnerable code is reached only through ioctl calls on the /dev/pkey misc device node; there is no network, adjacent-network, or remote-peer data path into `_copy_apqns_from_user()`. The in-kernel API (`pkey_key2protkey`) and sysfs paths always pass a NULL apqn list with count 0.\nAC:L - `apqn_entries` is a plain u32 field copied directly from the ioctl argument struct, so the attacker sets the value outright in a single deterministic ioctl call. No race, no memory-layout dependency, and no condition outside the attacker's control.\nPR:L - The pkey miscdevice is registered with `.mode = 0666`, making it world read/write, and neither `pkey_unlocked_ioctl()` nor any of the four reachable sub-handlers performs a `capable()` or `CAP_*` check. Any local unprivileged user on an s390 system with CONFIG_PKEY enabled (standard in distro mainframe kernels) can trigger it.\nUI:N - The attacker issues the ioctl directly from their own process; no victim action, mount, or file open by another user is involved.\nS:U - The undersized allocation and the resulting out-of-bounds access are both in kernel heap memory within the same security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The size/count desynchronization causes the CCA handlers to walk `apqns[i]` far past the end of an attacker-sized kmalloc buffer, an unbounded slab out-of-bounds read rather than a few-byte overread. The disclosed heap contents are consumed as card/domain selectors, exposing adjacent kernel object data.\nI:L - All handler signatures take `const struct pkey_apqn *apqns`, so the desynchronized buffer is only ever read — there is no out-of-bounds write or control-flow hijack primitive. Integrity impact is limited to out-of-bounds heap values steering crypto-adapter requests to attacker-uncontrolled card/domain pairs.\nA:H - Iterating up to billions of entries past a small kmalloc'd buffer reliably reaches unmapped memory, producing a kernel oops/panic, and the loop contains no `cond_resched()` so it can also stall the CPU. Any unprivileged local user can repeat this at will."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"drivers/s390/crypto/pkey_api.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
|
|
"lessThan": "ad1bdd24a02d5a8d119af8e4cd50933780a6d29f",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
|
|
"lessThan": "faa1ab4a23c42e34dc000ef4977b751d94d5148c",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
|
|
"lessThan": "88f3869649edbc4a13f6c2877091f81cd5a50f05",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
|
|
"lessThan": "f855b119e62b004a5044ed565f2a2b368c4d3f16",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
|
|
"lessThan": "73483ca7e07a5e39bdf612eec9d3d293e8bef649",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d",
|
|
"lessThan": "7360ee47599af91a1d5f4e74d635d9408a54e489",
|
|
"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/s390/crypto/pkey_api.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "5.4",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "5.4",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.187",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.143",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.96",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.36",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.15.5",
|
|
"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": "5.4",
|
|
"versionEndExcluding": "5.15.187"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.4",
|
|
"versionEndExcluding": "6.1.143"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.4",
|
|
"versionEndExcluding": "6.6.96"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.4",
|
|
"versionEndExcluding": "6.12.36"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.4",
|
|
"versionEndExcluding": "6.15.5"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "5.4",
|
|
"versionEndExcluding": "6.16"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/ad1bdd24a02d5a8d119af8e4cd50933780a6d29f"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/faa1ab4a23c42e34dc000ef4977b751d94d5148c"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/88f3869649edbc4a13f6c2877091f81cd5a50f05"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/f855b119e62b004a5044ed565f2a2b368c4d3f16"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/73483ca7e07a5e39bdf612eec9d3d293e8bef649"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/7360ee47599af91a1d5f4e74d635d9408a54e489"
|
|
}
|
|
],
|
|
"title": "s390/pkey: Prevent overflow in size calculation for memdup_user()",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"title": "CVE Program Container",
|
|
"references": [
|
|
{
|
|
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
|
|
}
|
|
],
|
|
"providerMetadata": {
|
|
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
|
"shortName": "CVE",
|
|
"dateUpdated": "2025-11-03T17:35:59.898Z"
|
|
}
|
|
},
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2025-38257",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-15T21:49:06.214372Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-15T21:52:12.939Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |