{"id":"CVE-2026-81015","title":"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 dr…","summary":"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 dr…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-459"],"vendor":"Linux","product":"Linux","affected":["Linux >= 49de59f69a76f538bfa5d0638a8c98d052546567 < d201c09c2428a4a8fd3bdcb032ae99f1e016458c","Linux >= 83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8 < bc9aa5fe21c3966c80647ed6574b94b863f23c62","Linux >= 83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8 < 30e5f4d0cd0be655c800f10ae3e530391aa6c1b5","Linux >= 83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8 < 76f650a76d6a36a4bee79d94db90a0e935a95477","Linux 6.14"],"published":"2026-09-11","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:41.570","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81015","references":[{"url":"https://git.kernel.org/stable/c/30e5f4d0cd0be655c800f10ae3e530391aa6c1b5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/76f650a76d6a36a4bee79d94db90a0e935a95477","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bc9aa5fe21c3966c80647ed6574b94b863f23c62","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d201c09c2428a4a8fd3bdcb032ae99f1e016458c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81015.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-81015"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532225"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-81015"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81015"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81015.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00175,"epssPercentile":0.06963,"scores":{"nvd":7.8,"vendor":7,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.475Z","slug":"CVE-2026-81015","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81015.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":215288,"id":"CVE-2026-81015","ts":1791027880697,"field":"cvss","old":"7","new":"7.8"},{"seq":204126,"id":"CVE-2026-81015","ts":1789490231858,"field":"cvss","old":"4.4","new":"7"},{"seq":204125,"id":"CVE-2026-81015","ts":1789490231858,"field":"severity","old":"medium","new":"high"},{"seq":202919,"id":"CVE-2026-81015","ts":1789403732943,"field":"cvss","old":"7.8","new":"4.4"},{"seq":202918,"id":"CVE-2026-81015","ts":1789403732943,"field":"severity","old":"high","new":"medium"},{"seq":183560,"id":"CVE-2026-81015","ts":1789356675887,"field":"cvss","old":"7.8","new":"4.4"},{"seq":183559,"id":"CVE-2026-81015","ts":1789356675887,"field":"severity","old":"high","new":"medium"},{"seq":153212,"id":"CVE-2026-81015","ts":1789285349570,"field":"cvss","old":null,"new":"7.8"},{"seq":153211,"id":"CVE-2026-81015","ts":1789285349570,"field":"severity","old":"none","new":"high"},{"seq":147530,"id":"CVE-2026-81015","ts":1789270211270,"field":"cvss","old":null,"new":"4.4"},{"seq":147529,"id":"CVE-2026-81015","ts":1789270211270,"field":"severity","old":"none","new":"medium"},{"seq":109286,"id":"CVE-2026-81015","ts":1789183731283,"field":"cvss","old":null,"new":"4.4"},{"seq":109285,"id":"CVE-2026-81015","ts":1789183731283,"field":"severity","old":"none","new":"medium"}]}