{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-57945", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-01-19T11:50:08.380Z", "datePublished": "2025-01-21T12:18:12.548Z", "dateUpdated": "2025-05-22T12:40:03.484Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-22T12:40:03.484Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/riscv/include/asm/page.h", "arch/riscv/include/asm/pgtable.h", "arch/riscv/mm/init.c"], "versions": [{"version": "8310080799b40fd9f2a8b808c657269678c149af", "lessThan": "92f08673d3f1893191323572f60e3c62f2e57c2f", "status": "affected", "versionType": "git"}, {"version": "a278d5c60f21aa15d540abb2f2da6e6d795c3e6e", "lessThan": "a4a7ac3d266008018f05fae53060fcb331151a14", "status": "affected", "versionType": "git"}, {"version": "a11dd49dcb9376776193e15641f84fcc1e5980c9", "lessThan": "d2bd51954ac8377c2f1eb1813e694788998add66", "status": "affected", "versionType": "git"}, {"version": "a11dd49dcb9376776193e15641f84fcc1e5980c9", "lessThan": "f754f27e98f88428aaf6be6e00f5cbce97f62d4b", "status": "affected", "versionType": "git"}, {"version": "8af1c121b0102041809bc137ec600d1865eaeedd", "status": "affected", "versionType": "git"}, {"version": "5941a90c55d3bfba732b32208d58d997600b44ef", "status": "affected", "versionType": "git"}, {"version": "2a1728c15ec4f45ed9248ae22f626541c179bfbe", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/riscv/include/asm/page.h", "arch/riscv/include/asm/pgtable.h", "arch/riscv/mm/init.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.140", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.72", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.10", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.81", "versionEndExcluding": "6.1.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.21", "versionEndExcluding": "6.6.72"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7.9"}]}]}], "references": [{"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"}}}}

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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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: riscv: mm: Corrige el problema de salida de l\u00edmites de la direcci\u00f3n vmemmap En el modelo vmemmap disperso, la direcci\u00f3n virtual de vmemmap se calcula como: ((struct page *)VMEMMAP_START - (phys_ram_base >> PAGE_SHIFT)). Y la va de la p\u00e1gina de estructura se puede calcular con un desplazamiento: (vmemmap + (pfn)). Sin embargo, al inicializar las p\u00e1ginas de estructura, el kernel en realidad comienza desde la primera p\u00e1gina de la misma secci\u00f3n a la que pertenece phys_ram_base. Si la direcci\u00f3n f\u00edsica de la primera p\u00e1gina no es (phys_ram_base >> PAGE_SHIFT), obtenemos una va por debajo de VMEMMAP_START al calcular la va para su p\u00e1gina de estructura. Por ejemplo, si phys_ram_base comienza desde 0x82000000 con pfn 0x82000, la primera p\u00e1gina en la misma secci\u00f3n es en realidad pfn 0x80000. Durante init_unavailable_range(), inicializaremos struct page para pfn 0x80000 con direcci\u00f3n virtual ((struct page *)VMEMMAP_START - 0x2000), que est\u00e1 debajo de VMEMMAP_START y PCI_IO_END. Esta confirmaci\u00f3n corrige este error al introducir una nueva variable 'vmemmap_start_pfn' que est\u00e1 alineada con el tama\u00f1o de la secci\u00f3n de memoria y la usa para calcular la direcci\u00f3n vmemmap en lugar de phys_ram_base."}], "id": "CVE-2024-57945", "lastModified": "2025-09-26T19:10:18.507", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-01-21T13:15:09.033", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/92f08673d3f1893191323572f60e3c62f2e57c2f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a4a7ac3d266008018f05fae53060fcb331151a14"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d2bd51954ac8377c2f1eb1813e694788998add66"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f754f27e98f88428aaf6be6e00f5cbce97f62d4b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: riscv: mm: Fix the out of bound issue of vmemmap address", "id": "2339131", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2339131"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nriscv: mm: Fix the out of bound issue of vmemmap address\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)).\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.\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.\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."], "name": "CVE-2024-57945", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-01-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-57945\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-57945\nhttps://lore.kernel.org/linux-cve-announce/2025012130-CVE-2024-57945-248b@gregkh/T"], "threat_severity": "Low"}