{"id":"CVE-2026-97947","revision":"f5cf7346af574fcbadce679c0eb18c4f","records":[{"revision":"f5cf7346af574fcbadce679c0eb18c4f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97947","aliases":[],"title":"x86/amd_node: Fix potential NULL pointer dereference","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_node: Fix potential NULL pointer dereference\n\namd_smn_read/write() are exported functions around __amd_smn_rw(), so\nthey are always available even if amd_smn_init() fails. In that case,\n'amd_roots' is NULL and __amd_smn_rw() will access uninitialized memory.\n\nThen, commit:\n\n  83518453074d (\"x86/amd_node: Add SMN offsets to exclusive region access\")\n\nadded the 'smn_exclusive' flag, which indicated the calls to\npci_request_config_region_exclusive() succeeded, to prevent\nconcurrent userspace access.\n\nCommit:\n\n  0a4b61d9c2e4 (\"x86/amd_node: Fix AMD root device caching\")\n\nre-ordered initialization so pci_request_config_region_exclusive() is\ncalled earlier and a failure exits amd_smn_init() before allocating\n'amd_roots'. The setting of 'smn_exclusive' moved to the end of\namd_smn_init(), after 'amd_roots' is allocated. It became redundant\nand can be removed.\n\nReplace 'smn_exclusive' with directly checking 'amd_roots', to fix a\npotential NULL pointer dereference and to simplify the logic.\n\n  [ bp: Reorg commit message, touchup comment. ]\n  [ mingo: Rebase & further touchups. ]","state":0,"publishedAt":"2026-09-25T10:22:57.163+00:00","modifiedAt":"2026-10-19T09:11:13.582+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                        \"arch/x86/kernel/amd_node.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"77466b798d59d6761501ff36094cf430d3876549\",\n                            \"lessThan\": \"fcd19bc829eca237742a3b123f839ad1c473ec85\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"77466b798d59d6761501ff36094cf430d3876549\",\n                            \"lessThan\": \"a797a2331e5d2ecdbccbae222ea71c759fdb2c2b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"77466b798d59d6761501ff36094cf430d3876549\",\n                            \"lessThan\": \"aefdbd574a362dcf7569bada6d72f64a006b9fb9\",\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                        \"arch/x86/kernel/amd_node.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\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\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":[],"references":["https://git.kernel.org/stable/c/fcd19bc829eca237742a3b123f839ad1c473ec85","https://git.kernel.org/stable/c/a797a2331e5d2ecdbccbae222ea71c759fdb2c2b","https://git.kernel.org/stable/c/aefdbd574a362dcf7569bada6d72f64a006b9fb9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97947","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97947","identifiers":["CVE-2026-97947"]},"retained":false,"historicalAffected":[]}],"coverage":[]}