CVE-2026-81015
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: platform/x86/amd/pmc: Fix LPS0 and debugfs leaks when STB init fails amd_pmc_probe() registers the LPS0 s2idle handler with acpi_register_lps0_dev() and creates the driver's debugfs directory before calling amd_stb_s2d_init(), which is the last step in probe that can fail. When amd_stb_s2d_init() fails (for example the S2D telemetry region cannot be ioremapped on a long-running system, or the SMU rejects the S2D setup) the error path only calls pci_dev_put() and returns. This leaves amd_pmc_s2idle_dev_ops on the global lps0_s2idle_devops_head list and leaks the debugfs directory, while the devm-managed resources backing the handler are torn down. Reloading the module then walks the corrupted list in acpi_register_lps0_dev() and hits: list_add corruption. next->prev should be prev, but was NULL. kernel BUG at lib/list_debug.c:29! acpi_register_lps0_dev+0x44/0x80 amd_pmc_probe+0x224/0x380 [amd_pmc] platform_probe+0x67/0x90 Even without a reload, the stale registration means the next s2idle transition calls into torn-down driver state. Unwind the debugfs directory and the LPS0 registration on the amd_stb_s2d_init() error path. acpi_unregister_lps0_dev() is safe to call unconditionally here: it is guarded on the same conditions as acpi_register_lps0_dev(), which is exactly what amd_pmc_remove() already relies on.
View original CVE JSON
{
"id": "CVE-2026-81015",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-11T20:19:10.437",
"lastModified": "2026-10-19T09:17:34.923",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86/amd/pmc: Fix LPS0 and debugfs leaks when STB init fails\n\namd_pmc_probe() registers the LPS0 s2idle handler with\nacpi_register_lps0_dev() and creates the driver's debugfs directory before\ncalling amd_stb_s2d_init(), which is the last step in probe that can fail.\n\nWhen amd_stb_s2d_init() fails (for example the S2D telemetry region cannot\nbe ioremapped on a long-running system, or the SMU rejects the S2D setup)\nthe error path only calls pci_dev_put() and returns. This leaves\namd_pmc_s2idle_dev_ops on the global lps0_s2idle_devops_head list and leaks\nthe debugfs directory, while the devm-managed resources backing the handler\nare torn down.\n\nReloading the module then walks the corrupted list in\nacpi_register_lps0_dev() and hits:\n\n list_add corruption. next->prev should be prev, but was NULL.\n kernel BUG at lib/list_debug.c:29!\n acpi_register_lps0_dev+0x44/0x80\n amd_pmc_probe+0x224/0x380 [amd_pmc]\n platform_probe+0x67/0x90\n\nEven without a reload, the stale registration means the next s2idle\ntransition calls into torn-down driver state.\n\nUnwind the debugfs directory and the LPS0 registration on the\namd_stb_s2d_init() error path. acpi_unregister_lps0_dev() is safe to call\nunconditionally here: it is guarded on the same conditions as\nacpi_register_lps0_dev(), which is exactly what amd_pmc_remove() already\nrelies on."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/platform/x86/amd/pmc/pmc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "49de59f69a76f538bfa5d0638a8c98d052546567",
"lessThan": "d201c09c2428a4a8fd3bdcb032ae99f1e016458c",
"versionType": "git",
"status": "affected"
},
{
"version": "83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8",
"lessThan": "bc9aa5fe21c3966c80647ed6574b94b863f23c62",
"versionType": "git",
"status": "affected"
},
{
"version": "83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8",
"lessThan": "30e5f4d0cd0be655c800f10ae3e530391aa6c1b5",
"versionType": "git",
"status": "affected"
},
{
"version": "83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8",
"lessThan": "76f650a76d6a36a4bee79d94db90a0e935a95477",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/platform/x86/amd/pmc/pmc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.14",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.14",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.50",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.4",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"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",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/30e5f4d0cd0be655c800f10ae3e530391aa6c1b5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/76f650a76d6a36a4bee79d94db90a0e935a95477",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bc9aa5fe21c3966c80647ed6574b94b863f23c62",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d201c09c2428a4a8fd3bdcb032ae99f1e016458c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}