{"id":"CVE-2026-81015","revision":"05a179c04d654b348ca82cdcdab128e0","records":[{"revision":"05a179c04d654b348ca82cdcdab128e0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-81015","aliases":[],"title":"platform/x86/amd/pmc: Fix LPS0 and debugfs leaks when STB init fails","description":"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.","state":0,"publishedAt":"2026-09-11T19:43:04.063+00:00","modifiedAt":"2026-10-19T08:46:40.596+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/platform/x86/amd/pmc/pmc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"49de59f69a76f538bfa5d0638a8c98d052546567\",\n                            \"lessThan\": \"d201c09c2428a4a8fd3bdcb032ae99f1e016458c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8\",\n                            \"lessThan\": \"bc9aa5fe21c3966c80647ed6574b94b863f23c62\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8\",\n                            \"lessThan\": \"30e5f4d0cd0be655c800f10ae3e530391aa6c1b5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8\",\n                            \"lessThan\": \"76f650a76d6a36a4bee79d94db90a0e935a95477\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/platform/x86/amd/pmc/pmc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/d201c09c2428a4a8fd3bdcb032ae99f1e016458c","https://git.kernel.org/stable/c/bc9aa5fe21c3966c80647ed6574b94b863f23c62","https://git.kernel.org/stable/c/30e5f4d0cd0be655c800f10ae3e530391aa6c1b5","https://git.kernel.org/stable/c/76f650a76d6a36a4bee79d94db90a0e935a95477"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-81015","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-81015","identifiers":["CVE-2026-81015"]},"retained":false,"historicalAffected":[]}],"coverage":[]}