{"id":"CVE-2026-97947","title":"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_in…","summary":"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_in…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 77466b798d59d6761501ff36094cf430d3876549 < fcd19bc829eca237742a3b123f839ad1c473ec85","Linux >= 77466b798d59d6761501ff36094cf430d3876549 < a797a2331e5d2ecdbccbae222ea71c759fdb2c2b","Linux >= 77466b798d59d6761501ff36094cf430d3876549 < aefdbd574a362dcf7569bada6d72f64a006b9fb9","Linux 6.14"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:22.213","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97947","references":[{"url":"https://git.kernel.org/stable/c/a797a2331e5d2ecdbccbae222ea71c759fdb2c2b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aefdbd574a362dcf7569bada6d72f64a006b9fb9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fcd19bc829eca237742a3b123f839ad1c473ec85","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97947.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97947"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541037"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97947"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97947"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97947.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-25T11:06:38.880Z","epss":0.00198,"epssPercentile":0.09498,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-476"],"slug":"CVE-2026-97947","body":"## Overview\n\nIn 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. ]\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** · Low · 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 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97947.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213349,"id":"CVE-2026-97947","ts":1790754697840,"field":"cvss","old":null,"new":"5.5"},{"seq":213348,"id":"CVE-2026-97947","ts":1790754697840,"field":"severity","old":"none","new":"medium"}]}