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vuln-cve/data/2025/21xxx/CVE-2025-21943.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-21943",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-12-29T08:45:45.789Z",
"datePublished": "2025-04-01T15:41:07.463Z",
"dateUpdated": "2026-05-11T21:09:32.538Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T21:09:32.538Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: aggregator: protect driver attr handlers against module unload\n\nBoth new_device_store and delete_device_store touch module global\nresources (e.g. gpio_aggregator_lock). To prevent race conditions with\nmodule unload, a reference needs to be held.\n\nAdd try_module_get() in these handlers.\n\nFor new_device_store, this eliminates what appears to be the most dangerous\nscenario: if an id is allocated from gpio_aggregator_idr but\nplatform_device_register has not yet been called or completed, a concurrent\nmodule unload could fail to unregister/delete the device, leaving behind a\ndangling platform device/GPIO forwarder. This can result in various issues.\nThe following simple reproducer demonstrates these problems:\n\n #!/bin/bash\n while :; do\n # note: whether 'gpiochip0 0' exists or not does not matter.\n echo 'gpiochip0 0' > /sys/bus/platform/drivers/gpio-aggregator/new_device\n done &\n while :; do\n modprobe gpio-aggregator\n modprobe -r gpio-aggregator\n done &\n wait\n\n Starting with the following warning, several kinds of warnings will appear\n and the system may become unstable:\n\n ------------[ cut here ]------------\n list_del corruption, ffff888103e2e980->next is LIST_POISON1 (dead000000000100)\n WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120\n [...]\n RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120\n [...]\n Call Trace:\n <TASK>\n ? __list_del_entry_valid_or_report+0xa3/0x120\n ? __warn.cold+0x93/0xf2\n ? __list_del_entry_valid_or_report+0xa3/0x120\n ? report_bug+0xe6/0x170\n ? __irq_work_queue_local+0x39/0xe0\n ? handle_bug+0x58/0x90\n ? exc_invalid_op+0x13/0x60\n ? asm_exc_invalid_op+0x16/0x20\n ? __list_del_entry_valid_or_report+0xa3/0x120\n gpiod_remove_lookup_table+0x22/0x60\n new_device_store+0x315/0x350 [gpio_aggregator]\n kernfs_fop_write_iter+0x137/0x1f0\n vfs_write+0x262/0x430\n ksys_write+0x60/0xd0\n do_syscall_64+0x6c/0x180\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n [...]\n </TASK>\n ---[ end trace 0000000000000000 ]---"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/gpio/gpio-aggregator.c"
],
"versions": [
{
"version": "828546e24280f721350a7a0dcc92416e917b4382",
"lessThan": "fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117",
"status": "affected",
"versionType": "git"
},
{
"version": "828546e24280f721350a7a0dcc92416e917b4382",
"lessThan": "807789018186cf508ceb3a1f8f02935cd195717b",
"status": "affected",
"versionType": "git"
},
{
"version": "828546e24280f721350a7a0dcc92416e917b4382",
"lessThan": "9334c88fc2fbc6836b307d269fcc1744c69701c0",
"status": "affected",
"versionType": "git"
},
{
"version": "828546e24280f721350a7a0dcc92416e917b4382",
"lessThan": "d99dc8f7ea01ee1b21306e0eda8eb18a4af80db6",
"status": "affected",
"versionType": "git"
},
{
"version": "828546e24280f721350a7a0dcc92416e917b4382",
"lessThan": "8fb07fb1bba91d45846ed8605c3097fe67a7d54c",
"status": "affected",
"versionType": "git"
},
{
"version": "828546e24280f721350a7a0dcc92416e917b4382",
"lessThan": "56281a76b805b5ac61feb5d580139695a22f87f0",
"status": "affected",
"versionType": "git"
},
{
"version": "828546e24280f721350a7a0dcc92416e917b4382",
"lessThan": "12f65d1203507f7db3ba59930fe29a3b8eee9945",
"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/gpio/gpio-aggregator.c"
],
"versions": [
{
"version": "5.8",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.8",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.235",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.179",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.131",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.83",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.19",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.13.7",
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.14",
"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": "5.8",
"versionEndExcluding": "5.10.235"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.8",
"versionEndExcluding": "5.15.179"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.8",
"versionEndExcluding": "6.1.131"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.8",
"versionEndExcluding": "6.6.83"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.8",
"versionEndExcluding": "6.12.19"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.8",
"versionEndExcluding": "6.13.7"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.8",
"versionEndExcluding": "6.14"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117"
},
{
"url": "https://git.kernel.org/stable/c/807789018186cf508ceb3a1f8f02935cd195717b"
},
{
"url": "https://git.kernel.org/stable/c/9334c88fc2fbc6836b307d269fcc1744c69701c0"
},
{
"url": "https://git.kernel.org/stable/c/d99dc8f7ea01ee1b21306e0eda8eb18a4af80db6"
},
{
"url": "https://git.kernel.org/stable/c/8fb07fb1bba91d45846ed8605c3097fe67a7d54c"
},
{
"url": "https://git.kernel.org/stable/c/56281a76b805b5ac61feb5d580139695a22f87f0"
},
{
"url": "https://git.kernel.org/stable/c/12f65d1203507f7db3ba59930fe29a3b8eee9945"
}
],
"title": "gpio: aggregator: protect driver attr handlers against module unload",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-362",
"lang": "en",
"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 4.7,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2025-10-01T17:17:38.478936Z",
"id": "CVE-2025-21943",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2025-10-01T17:17:41.198Z"
}
},
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T19:39:43.188Z"
}
}
]
}
}