{"api_version":"1","generated_at":"2026-07-23T13:21:13+00:00","cve":"CVE-2024-57945","urls":{"html":"https://cve.report/CVE-2024-57945","api":"https://cve.report/api/cve/CVE-2024-57945.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2024-57945","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-57945"},"summary":{"title":"riscv: mm: Fix the out of bound issue of vmemmap address","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: Fix the out of bound issue of vmemmap address\n\nIn sparse vmemmap model, the virtual address of vmemmap is calculated as:\n((struct page *)VMEMMAP_START - (phys_ram_base >> PAGE_SHIFT)).\nAnd the struct page's va can be calculated with an offset:\n(vmemmap + (pfn)).\n\nHowever, when initializing struct pages, kernel actually starts from the\nfirst page from the same section that phys_ram_base belongs to. If the\nfirst page's physical address is not (phys_ram_base >> PAGE_SHIFT), then\nwe get an va below VMEMMAP_START when calculating va for it's struct page.\n\nFor example, if phys_ram_base starts from 0x82000000 with pfn 0x82000, the\nfirst page in the same section is actually pfn 0x80000. During\ninit_unavailable_range(), we will initialize struct page for pfn 0x80000\nwith virtual address ((struct page *)VMEMMAP_START - 0x2000), which is\nbelow VMEMMAP_START as well as PCI_IO_END.\n\nThis commit fixes this bug by introducing a new variable\n'vmemmap_start_pfn' which is aligned with memory section size and using\nit to calculate vmemmap address instead of phys_ram_base.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-01-21 13:15:09","updated_at":"2026-06-01 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the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: Fix the out of bound issue of vmemmap address\n\nIn sparse vmemmap model, the virtual address of vmemmap is calculated as:\n((struct page *)VMEMMAP_START - (phys_ram_base >> PAGE_SHIFT)).\nAnd the struct page's va can be calculated with an offset:\n(vmemmap + (pfn)).\n\nHowever, when initializing struct pages, kernel actually starts from the\nfirst page from the same section that phys_ram_base belongs to. If the\nfirst page's physical address is not (phys_ram_base >> PAGE_SHIFT), then\nwe get an va below VMEMMAP_START when calculating va for it's struct page.\n\nFor example, if phys_ram_base starts from 0x82000000 with pfn 0x82000, the\nfirst page in the same section is actually pfn 0x80000. During\ninit_unavailable_range(), we will initialize struct page for pfn 0x80000\nwith virtual address ((struct page *)VMEMMAP_START - 0x2000), which is\nbelow VMEMMAP_START as well as PCI_IO_END.\n\nThis commit fixes this bug by introducing a new variable\n'vmemmap_start_pfn' which is aligned with memory section size and using\nit to calculate vmemmap address instead of phys_ram_base."}],"providerMetadata":{"dateUpdated":"2026-06-01T16:04:57.860Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/04350304428063da6a55a8a4597d409dc69148b2"},{"url":"https://git.kernel.org/stable/c/92f08673d3f1893191323572f60e3c62f2e57c2f"},{"url":"https://git.kernel.org/stable/c/a4a7ac3d266008018f05fae53060fcb331151a14"},{"url":"https://git.kernel.org/stable/c/d2bd51954ac8377c2f1eb1813e694788998add66"},{"url":"https://git.kernel.org/stable/c/f754f27e98f88428aaf6be6e00f5cbce97f62d4b"}],"title":"riscv: mm: Fix the out of bound issue of vmemmap address","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2024-57945","datePublished":"2025-01-21T12:18:12.548Z","dateReserved":"2025-01-19T11:50:08.380Z","dateUpdated":"2026-06-01T16:04:57.860Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-01-21 13:15:09","lastModifiedDate":"2026-06-01 17:16:32","problem_types":["CWE-125"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.212","versionEndExcluding":"5.11","matchCriteriaId":"F1E6B58E-F7D7-480E-A09B-0FA874293160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.151","versionEndExcluding":"5.16","matchCriteriaId":"DF37B912-2F16-4C92-A527-CD2B342631D5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.81","versionEndExcluding":"6.1.140","matchCriteriaId":"41B78C99-AE93-456C-9689-C4B567C67F85"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.21","versionEndExcluding":"6.6.72","matchCriteriaId":"7537BD1C-63FF-4CA8-B2A1-151A8D1AA8E1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7.9","versionEndExcluding":"6.8","matchCriteriaId":"739125EE-99C1-42E1-B870-04FD5010BA66"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8.1","versionEndExcluding":"6.12.10","matchCriteriaId":"B62FEA87-2A2A-4A33-A535-AEE5670C4FB3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.8:-:*:*:*:*:*:*","matchCriteriaId":"41E47F32-BA80-4333-96FD-4D25082B0FDD"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:*","matchCriteriaId":"C9B8A5CE-6D20-4C36-AC01-ACA4B70003A8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*","matchCriteriaId":"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*","matchCriteriaId":"5A073481-106D-4B15-B4C7-FB0213B8E1D4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*","matchCriteriaId":"DE491969-75AE-4A6B-9A58-8FC5AF98798F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*","matchCriteriaId":"93C0660D-7FB8-4FBA-892A-B064BA71E49E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*","matchCriteriaId":"034C36A6-C481-41F3-AE9A-D116E5BE6895"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*","matchCriteriaId":"8AF9DC49-2085-4FFB-A7E3-73DFAFECC7F2"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2024","CveId":"57945","Ordinal":"1","Title":"riscv: mm: Fix the out of bound issue of vmemmap address","CVE":"CVE-2024-57945","Year":"2024"},"notes":[{"CveYear":"2024","CveId":"57945","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: Fix the out of bound issue of vmemmap address\n\nIn sparse vmemmap model, the virtual address of vmemmap is calculated as:\n((struct page *)VMEMMAP_START - (phys_ram_base >> PAGE_SHIFT)).\nAnd the struct page's va can be calculated with an offset:\n(vmemmap + (pfn)).\n\nHowever, when initializing struct pages, kernel actually starts from the\nfirst page from the same section that phys_ram_base belongs to. If the\nfirst page's physical address is not (phys_ram_base >> PAGE_SHIFT), then\nwe get an va below VMEMMAP_START when calculating va for it's struct page.\n\nFor example, if phys_ram_base starts from 0x82000000 with pfn 0x82000, the\nfirst page in the same section is actually pfn 0x80000. During\ninit_unavailable_range(), we will initialize struct page for pfn 0x80000\nwith virtual address ((struct page *)VMEMMAP_START - 0x2000), which is\nbelow VMEMMAP_START as well as PCI_IO_END.\n\nThis commit fixes this bug by introducing a new variable\n'vmemmap_start_pfn' which is aligned with memory section size and using\nit to calculate vmemmap address instead of phys_ram_base.","Type":"Description","Title":"riscv: mm: Fix the out of bound issue of vmemmap address"}]}}}