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vuln-cve/data/2026/53xxx/CVE-2026-53160.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-53160",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-06-09T07:44:35.388Z",
"datePublished": "2026-06-25T08:38:42.138Z",
"dateUpdated": "2026-08-05T12:33:35.015Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:33:35.015Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: fix use-after-free race in fastrpc_map_create\n\nfastrpc_map_lookup returns a raw pointer after releasing fl->lock. The\ncaller fastrpc_map_create then calls fastrpc_map_get (kref_get_unless_zero)\non this unprotected pointer. A concurrent MEM_UNMAP can free the map\nbetween the lock release and the kref operation, resulting in a\nuse-after-free on the freed slab object.\n\nRestore the take_ref parameter to fastrpc_map_lookup so the reference\nis acquired atomically under fl->lock before the pointer is exposed to\nthe caller."
}
],
"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 through local FastRPC misc-device ioctls such as FASTRPC_IOCTL_MEM_MAP, FASTRPC_IOCTL_INVOKE, and FASTRPC_IOCTL_INIT_CREATE. There is no network or adjacent-path entry point.\nAC:L - The attacker can drive both sides of the race by issuing concurrent map-creating and MEM_UNMAP ioctls against the same FastRPC file context and DMA-buf fd. No condition outside attacker control is required beyond scheduling the race.\nPR:L - The ioctl path has no in-driver capable(), namespace capability, or credential check once the FastRPC device node is open. Exploitation requires local access to the device node as a basic user or device-authorized app, not real root.\nUI:N - No victim action is required after the attacker has local access. The attacker directly opens the FastRPC device and submits ioctls.\nS:U - This is a kernel memory safety bug in a local kernel driver and exploitation would affect the same kernel security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation by itself.\nC:H - The bug is a use-after-free on struct fastrpc_map, a slab object containing pointers and DMA mapping state. Under the required high-severity rule, this memory corruption is treated as capable of enabling kernel information disclosure.\nI:H - The use-after-free can be raced with allocator reuse and involves refcount/list/DMA mapping state, making control of freed object contents plausibly exploitable for kernel memory corruption. Under the kernel guidance, UAFs receive high integrity impact.\nA:H - Even without full exploitation, racing kref_get_unless_zero() and later map-field use on a freed object can trigger kernel warnings, oopses, or crashes. Repeated local ioctls can therefore cause high availability impact."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/misc/fastrpc.c"
],
"versions": [
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"version": "0b70ec82b309a4093106ff399da1911ad23b52d3",
"lessThan": "0a3b87293fbd34fda651e6aead9964f84b893962",
"status": "affected",
"versionType": "git"
},
{
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"status": "affected",
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},
{
"version": "802359a52676176b18713e33caa17572ad009057",
"lessThan": "5b0166112019d1dce30b976ab28fd67f7f0be532",
"status": "affected",
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},
{
"version": "10df039834f84a297c72ec962c0f9b7c8c5ca31a",
"lessThan": "992f121796b7ca83a5a8b93da24e971363206218",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "f20f6512ecb75c816e0debf4551a138f098615c4",
"status": "affected",
"versionType": "git"
},
{
"version": "10df039834f84a297c72ec962c0f9b7c8c5ca31a",
"lessThan": "07ebe87915d8accdaba20c4f88c5ae430fe62fbb",
"status": "affected",
"versionType": "git"
},
{
"version": "f3f59bab68e9bc714f757ab22f3fb36153014043",
"status": "affected",
"versionType": "git"
},
{
"version": "6.1.156",
"lessThan": "6.1.176",
"status": "affected",
"versionType": "semver"
},
{
"version": "6.6.112",
"lessThan": "6.6.143",
"status": "affected",
"versionType": "semver"
},
{
"version": "6.12.53",
"lessThan": "6.12.94",
"status": "affected",
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},
{
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"lessThan": "6.18",
"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/misc/fastrpc.c"
],
"versions": [
{
"version": "6.18",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.18",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.176",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.143",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.94",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.36",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.0.13",
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1",
"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": "6.1.156",
"versionEndExcluding": "6.1.176"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6.112",
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},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.12.53",
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},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.18",
"versionEndExcluding": "6.18.36"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.18",
"versionEndExcluding": "7.0.13"
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{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.18",
"versionEndExcluding": "7.1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.17.3"
}
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}
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962"
},
{
"url": "https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c"
},
{
"url": "https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532"
},
{
"url": "https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218"
},
{
"url": "https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4"
},
{
"url": "https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb"
}
],
"title": "misc: fastrpc: fix use-after-free race in fastrpc_map_create",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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