{"api_version":"1","generated_at":"2026-07-20T14:43:35+00:00","cve":"CVE-2026-64180","urls":{"html":"https://cve.report/CVE-2026-64180","api":"https://cve.report/api/cve/CVE-2026-64180.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64180","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64180"},"summary":{"title":"mm/memory_hotplug: fix memory block reference leak on remove","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory_hotplug: fix memory block reference leak on remove\n\nPatch series \"mm: Fix memory block leaks and locking\", v2.\n\nThis series fixes two memory block device reference leaks and one locking\nissue around the per-memory_block hwpoison counter.\n\n\nThis patch (of 2):\n\nremove_memory_blocks_and_altmaps() looks up each memory block with\nfind_memory_block(), which acquires a reference to the memory block\ndevice.\n\nThat reference is never dropped on this path, resulting in a leaked device\nreference when removing memory blocks and their altmaps.  Drop the\nreference after retrieving mem->altmap and clearing mem->altmap, before\nremoving the memory block device.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:18:00","updated_at":"2026-07-19 16:18:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967","name":"https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74","name":"https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06","name":"https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b","name":"https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64180","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64180","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6b8f0798b85aa529011570369db985a788f3003f b8ab30c79fc00147125b9c39f928561d9dd13d06 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6b8f0798b85aa529011570369db985a788f3003f 09ce923071e7852ece60d7368e05249bf32c7967 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6b8f0798b85aa529011570369db985a788f3003f df64c0d21c3f85f844b2f656333e43d97e6ffa74 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6b8f0798b85aa529011570369db985a788f3003f 93866f55f7e292fe3d47d36c9efe5ee10213a06b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["mm/memory_hotplug.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b8ab30c79fc00147125b9c39f928561d9dd13d06","status":"affected","version":"6b8f0798b85aa529011570369db985a788f3003f","versionType":"git"},{"lessThan":"09ce923071e7852ece60d7368e05249bf32c7967","status":"affected","version":"6b8f0798b85aa529011570369db985a788f3003f","versionType":"git"},{"lessThan":"df64c0d21c3f85f844b2f656333e43d97e6ffa74","status":"affected","version":"6b8f0798b85aa529011570369db985a788f3003f","versionType":"git"},{"lessThan":"93866f55f7e292fe3d47d36c9efe5ee10213a06b","status":"affected","version":"6b8f0798b85aa529011570369db985a788f3003f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["mm/memory_hotplug.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory_hotplug: fix memory block reference leak on remove\n\nPatch series \"mm: Fix memory block leaks and locking\", v2.\n\nThis series fixes two memory block device reference leaks and one locking\nissue around the per-memory_block hwpoison counter.\n\n\nThis patch (of 2):\n\nremove_memory_blocks_and_altmaps() looks up each memory block with\nfind_memory_block(), which acquires a reference to the memory block\ndevice.\n\nThat reference is never dropped on this path, resulting in a leaked device\nreference when removing memory blocks and their altmaps.  Drop the\nreference after retrieving mem->altmap and clearing mem->altmap, before\nremoving the memory block device."}],"providerMetadata":{"dateUpdated":"2026-07-19T15:41:03.751Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06"},{"url":"https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967"},{"url":"https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74"},{"url":"https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b"}],"title":"mm/memory_hotplug: fix memory block reference leak on remove","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64180","datePublished":"2026-07-19T15:41:03.751Z","dateReserved":"2026-07-19T07:54:57.039Z","dateUpdated":"2026-07-19T15:41:03.751Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:18:00","lastModifiedDate":"2026-07-19 16:18:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64180","Ordinal":"1","Title":"mm/memory_hotplug: fix memory block reference leak on remove","CVE":"CVE-2026-64180","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64180","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory_hotplug: fix memory block reference leak on remove\n\nPatch series \"mm: Fix memory block leaks and locking\", v2.\n\nThis series fixes two memory block device reference leaks and one locking\nissue around the per-memory_block hwpoison counter.\n\n\nThis patch (of 2):\n\nremove_memory_blocks_and_altmaps() looks up each memory block with\nfind_memory_block(), which acquires a reference to the memory block\ndevice.\n\nThat reference is never dropped on this path, resulting in a leaked device\nreference when removing memory blocks and their altmaps.  Drop the\nreference after retrieving mem->altmap and clearing mem->altmap, before\nremoving the memory block device.","Type":"Description","Title":"mm/memory_hotplug: fix memory block reference leak on remove"}]}}}