{"id":"CVE-2023-53446","summary":"PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free\n\nStruct pcie_link_state-\u003edownstream is a pointer to the pci_dev of function\n0.  Previously we retained that pointer when removing function 0, and\nsubsequent ASPM policy changes dereferenced it, resulting in a\nuse-after-free warning from KASAN, e.g.:\n\n  # echo 1 \u003e /sys/bus/pci/devices/0000:03:00.0/remove\n  # echo powersave \u003e /sys/module/pcie_aspm/parameters/policy\n\n  BUG: KASAN: slab-use-after-free in pcie_config_aspm_link+0x42d/0x500\n  Call Trace:\n   kasan_report+0xae/0xe0\n   pcie_config_aspm_link+0x42d/0x500\n   pcie_aspm_set_policy+0x8e/0x1a0\n   param_attr_store+0x162/0x2c0\n   module_attr_store+0x3e/0x80\n\nPCIe spec r6.0, sec 7.5.3.7, recommends that software program the same ASPM\nControl value in all functions of multi-function devices.\n\nDisable ASPM and free the pcie_link_state when any child function is\nremoved so we can discard the dangling pcie_link_state-\u003edownstream pointer\nand maintain the same ASPM Control configuration for all functions.\n\n[bhelgaas: commit log and comment]","modified":"2026-04-02T09:44:13.625448Z","published":"2025-09-18T16:04:21.939Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03614-1","SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3751-1","SUSE-SU-2025:3761-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4141-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53446.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4203722d51afe3d239e03f15cc73efdf023a7103"},{"type":"WEB","url":"https://git.kernel.org/stable/c/456d8aa37d0f56fc9e985e812496e861dcd6f2f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/666e7f9d60cee23077ea3e6331f6f8a19f7ea03f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7aecdd47910c51707696e8b0e045b9f88bd4230f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7badf4d6f49a358a01ab072bbff88d3ee886c33b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9856c0de49052174ab474113f4ba40c02aaee086"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d51d2eeae4ce54d542909c4d9d07bf371a78592c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53446.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53446"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b5a0a9b59c8185aebcd9a717e2e6258b58c72c06"},{"fixed":"666e7f9d60cee23077ea3e6331f6f8a19f7ea03f"},{"fixed":"7badf4d6f49a358a01ab072bbff88d3ee886c33b"},{"fixed":"9856c0de49052174ab474113f4ba40c02aaee086"},{"fixed":"7aecdd47910c51707696e8b0e045b9f88bd4230f"},{"fixed":"d51d2eeae4ce54d542909c4d9d07bf371a78592c"},{"fixed":"4203722d51afe3d239e03f15cc73efdf023a7103"},{"fixed":"456d8aa37d0f56fc9e985e812496e861dcd6f2f2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53446.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}