{"id":"CVE-2026-97946","state":"PUBLISHED","title":"x86/amd_node: Fix PCI device reference counting in amd_smn_init()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_node: Fix PCI device reference counting in amd_smn_init()\n\nThe local \"root\" pointer is a temporary variable used during the device\nsearch. Therefore, refcount related to the search iterators should be cleaned\nup after the search is complete.\n\nUse the __free() cleanup macro to ensure the refcount is decremented when the\ntemporary pointer goes out of scope.\n\nAdditionally, increment the refcount when caching a root pointer. This ensures\nthe in-use refcount is separate from the temporary search refcounting.\n\nFinally, drop the redundant \"root = NULL\" before the second search loop. The\npci_get_class() iterator always decrements the refcount of its \"from\"\nargument, so the first loop can only fall through with \"root\" already NULL.","publishedAt":"2026-09-25T10:22:56.572Z","updatedAt":"2026-10-19T09:11:12.606Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","status":"affected","lessThan":"84e3a71d11d8593c127b468d75b2653af5074f81","versionType":"git"},{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","status":"affected","lessThan":"aa2a4277ad42fd8f918c6dc652473946a253f7b0","versionType":"git"},{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","status":"affected","lessThan":"27600805e62f800bacf990354632eae4e487d34c","versionType":"git"},{"version":"c4ad899a33198ab6335732c769835d035e66894a","status":"affected","versionType":"git"},{"version":"6.17.8","status":"affected","lessThan":"6.18","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/amd_node.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/amd_node.c"]}],"references":["https://git.kernel.org/stable/c/84e3a71d11d8593c127b468d75b2653af5074f81","https://git.kernel.org/stable/c/aa2a4277ad42fd8f918c6dc652473946a253f7b0","https://git.kernel.org/stable/c/27600805e62f800bacf990354632eae4e487d34c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97946.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97946","state":"PUBLISHED","datePublished":"2026-09-25T10:22:56.572Z","dateUpdated":"2026-10-19T09:11:12.606Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:18:58.204Z"},"containers":{"cna":{"title":"x86/amd_node: Fix PCI device reference counting in amd_smn_init()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_node: Fix PCI device reference counting in amd_smn_init()\n\nThe local \"root\" pointer is a temporary variable used during the device\nsearch. Therefore, refcount related to the search iterators should be cleaned\nup after the search is complete.\n\nUse the __free() cleanup macro to ensure the refcount is decremented when the\ntemporary pointer goes out of scope.\n\nAdditionally, increment the refcount when caching a root pointer. This ensures\nthe in-use refcount is separate from the temporary search refcounting.\n\nFinally, drop the redundant \"root = NULL\" before the second search loop. The\npci_get_class() iterator always decrements the refcount of its \"from\"\nargument, so the first loop can only fall through with \"root\" already NULL."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","status":"affected","lessThan":"84e3a71d11d8593c127b468d75b2653af5074f81","versionType":"git"},{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","status":"affected","lessThan":"aa2a4277ad42fd8f918c6dc652473946a253f7b0","versionType":"git"},{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","status":"affected","lessThan":"27600805e62f800bacf990354632eae4e487d34c","versionType":"git"},{"version":"c4ad899a33198ab6335732c769835d035e66894a","status":"affected","versionType":"git"},{"version":"6.17.8","status":"affected","lessThan":"6.18","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/amd_node.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/amd_node.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/84e3a71d11d8593c127b468d75b2653af5074f81"},{"url":"https://git.kernel.org/stable/c/aa2a4277ad42fd8f918c6dc652473946a253f7b0"},{"url":"https://git.kernel.org/stable/c/27600805e62f800bacf990354632eae4e487d34c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:11:12.606Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}