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vuln-cve/data/2025/39xxx/CVE-2025-39871.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-39871",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-04-16T07:20:57.143Z",
"datePublished": "2025-09-23T06:00:44.882Z",
"dateUpdated": "2026-11-10T12:37:14.475Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-23T16:00:53.676Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Remove improper idxd_free\n\nThe call to idxd_free() introduces a duplicate put_device() leading to a\nreference count underflow:\nrefcount_t: underflow; use-after-free.\nWARNING: CPU: 15 PID: 4428 at lib/refcount.c:28 refcount_warn_saturate+0xbe/0x110\n...\nCall Trace:\n <TASK>\n idxd_remove+0xe4/0x120 [idxd]\n pci_device_remove+0x3f/0xb0\n device_release_driver_internal+0x197/0x200\n driver_detach+0x48/0x90\n bus_remove_driver+0x74/0xf0\n pci_unregister_driver+0x2e/0xb0\n idxd_exit_module+0x34/0x7a0 [idxd]\n __do_sys_delete_module.constprop.0+0x183/0x280\n do_syscall_64+0x54/0xd70\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nThe idxd_unregister_devices() which is invoked at the very beginning of\nidxd_remove(), already takes care of the necessary put_device() through the\nfollowing call path:\nidxd_unregister_devices() -> device_unregister() -> put_device()\n\nIn addition, when CONFIG_DEBUG_KOBJECT_RELEASE is enabled, put_device() may\ntrigger asynchronous cleanup via schedule_delayed_work(). If idxd_free() is\ncalled immediately after, it can result in a use-after-free.\n\nRemove the improper idxd_free() to avoid both the refcount underflow and\npotential memory corruption during module unload."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/dma/idxd/init.c"
],
"versions": [
{
"version": "68ac5a01f635b3791196fd1c39bc48497252c36f",
"lessThan": "24414bbcb37e1af95190af36c21ae51d497e1a9e",
"status": "affected",
"versionType": "git"
},
{
"version": "d2d05fd0fc95c4defed6f7b87550e20e8baa1d97",
"lessThan": "0e95ee7f532b21206fe3f1c4054002b0d21e3b9c",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "dd7a7e43269711d757fc260b0bbdf7138f75de11",
"status": "affected",
"versionType": "git"
},
{
"version": "d5449ff1b04dfe9ed8e455769aa01e4c2ccf6805",
"lessThan": "da4fbc1488a4cec6748da685181ee4449a878dac",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "f41c538881eec4dcf5961a242097d447f848cda6",
"status": "affected",
"versionType": "git"
},
{
"version": "2b7a961cea0e5b65afda911f76d14fec5c98d024",
"status": "affected",
"versionType": "git"
},
{
"version": "6.1.140",
"lessThan": "6.1.160",
"status": "affected",
"versionType": "semver"
},
{
"version": "6.6.92",
"lessThan": "6.6.107",
"status": "affected",
"versionType": "semver"
},
{
"version": "6.12.30",
"lessThan": "6.12.48",
"status": "affected",
"versionType": "semver"
},
{
"version": "6.14.8",
"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/dma/idxd/init.c"
],
"versions": [
{
"version": "6.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.15",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.160",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.107",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.48",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.16.8",
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.17",
"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": "6.1.140",
"versionEndExcluding": "6.1.160"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6.92",
"versionEndExcluding": "6.6.107"
},
{
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"versionStartIncluding": "6.12.30",
"versionEndExcluding": "6.12.48"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.15",
"versionEndExcluding": "6.16.8"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.15",
"versionEndExcluding": "6.17"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.14.8"
}
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/24414bbcb37e1af95190af36c21ae51d497e1a9e"
},
{
"url": "https://git.kernel.org/stable/c/0e95ee7f532b21206fe3f1c4054002b0d21e3b9c"
},
{
"url": "https://git.kernel.org/stable/c/dd7a7e43269711d757fc260b0bbdf7138f75de11"
},
{
"url": "https://git.kernel.org/stable/c/da4fbc1488a4cec6748da685181ee4449a878dac"
},
{
"url": "https://git.kernel.org/stable/c/f41c538881eec4dcf5961a242097d447f848cda6"
}
],
"title": "dmaengine: idxd: Remove improper idxd_free",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"x_adpType": "supplier",
"providerMetadata": {
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"shortName": "siemens-SADP",
"dateUpdated": "2026-11-10T12:37:14.475Z"
},
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"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
"versions": [
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"status": "affected",
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"lessThan": "*",
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}
}
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