226 lines
11 KiB
JSON
226 lines
11 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-64559",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-07-19T15:36:31.796Z",
|
|
"datePublished": "2026-07-29T16:31:22.195Z",
|
|
"dateUpdated": "2026-10-19T20:48:41.365Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-17T04:57:37.809Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pkey: Check length in PKEY_VERIFYPROTK ioctl\n\nExplicitly check the buffer length request structure provided by\nuser-space and fail, if it exceeds the buffer size."
|
|
}
|
|
],
|
|
"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 vulnerability is reached only through the PKEY_VERIFYPROTK ioctl on the /dev/pkey character device, which requires local access to the system. There is no network-facing path to this code.\nAC:L - Triggering is fully deterministic — a single ioctl with protkey.len set to 0x20000010 wraps the u32 multiplication to a legal 128-bit keytype and drives the unchecked memcpy; no race, timing, or uncontrollable memory-layout condition is involved.\nPR:L - The pkey miscdevice is registered with .mode = 0666 and neither the open handler nor pkey_unlocked_ioctl performs any capability check, so any unprivileged local user (including a normal shell user on a shared IBM Z LPAR or z/VM guest) can issue the ioctl.\nUI:N - The attacker performs the entire attack via its own ioctl call; no action by any other user or administrator is needed.\nS:U - The out-of-bounds read and write are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked memcpy performs a huge out-of-bounds read that walks off the 64-byte on-stack protkey buffer through the entire kernel stack, relocating arbitrary kernel stack contents — including protected key material handled by this crypto driver — into heap objects, an unbounded kernel memory disclosure primitive.\nI:H - This is a massive slab out-of-bounds write into an 80-byte kmalloc-96 allocation whose first 64 bytes are entirely attacker-supplied and whose subsequent bytes come from groomable kernel-stack data, corrupting adjacent slab objects and providing a heap-overflow primitive suitable for control-flow hijacking.\nA:H - The smallest length that bypasses the keytype check requests a 512 MB copy, so the source pointer inevitably hits the VMAP_STACK guard page, producing an unhandled kernel fault/oops and panic after wide-scale heap corruption — a guaranteed, repeatable denial of service."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"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": "8fcc231ce3bea12b78bb94b280cdc03cff342435",
|
|
"lessThan": "0a9e34ccbe772b8f321388cdbdf4f22b94e513e7",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8fcc231ce3bea12b78bb94b280cdc03cff342435",
|
|
"lessThan": "693bf91d4db134f9b1c2840c8e287eee3d993bac",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8fcc231ce3bea12b78bb94b280cdc03cff342435",
|
|
"lessThan": "7e7e03848c918aa0acad5ffd75d929e3afec1554",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "8fcc231ce3bea12b78bb94b280cdc03cff342435",
|
|
"lessThan": "b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970",
|
|
"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": "6.12",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.12",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.97",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.40",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.1.5",
|
|
"lessThanOrEqual": "7.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.2",
|
|
"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",
|
|
"versionEndExcluding": "6.12.97"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.12",
|
|
"versionEndExcluding": "6.18.40"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.12",
|
|
"versionEndExcluding": "7.1.5"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.12",
|
|
"versionEndExcluding": "7.2"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0a9e34ccbe772b8f321388cdbdf4f22b94e513e7"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/693bf91d4db134f9b1c2840c8e287eee3d993bac"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/7e7e03848c918aa0acad5ffd75d929e3afec1554"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970"
|
|
}
|
|
],
|
|
"title": "s390/pkey: Check length in PKEY_VERIFYPROTK ioctl",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-64559",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:42:43.749651Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-125",
|
|
"description": "CWE-125 Out-of-bounds Read"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T20:48:41.365Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |