platform/x86/amd/pmc: Fix LPS0 and debugfs leaks when STB init fails
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.
CVE-2026-81015
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-81015
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"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"
}
],
"programFiles": [
"drivers/platform/x86/amd/pmc/pmc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/platform/x86/amd/pmc/pmc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-81015
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34970 · Revision 1
- Added to Heist Feed
- Publisher date