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{"bugzilla": {"description": "kernel: mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy()", "id": "2337151", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2337151"}, "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"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy()\nIn split_large_buddy(), we might call pfn_to_page() on a PFN that might\nnot exist. In corner cases, such as when freeing the highest pageblock in\nthe last memory section, this could result with CONFIG_SPARSEMEM &&\n!CONFIG_SPARSEMEM_EXTREME in __pfn_to_section() returning NULL and and\n__section_mem_map_addr() dereferencing that NULL pointer.\nLet's fix it, and avoid doing a pfn_to_page() call for the first\niteration, where we already have the page.\nSo far this was found by code inspection, but let's just CC stable as the\nfix is easy."], "name": "CVE-2024-57881", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2025-01-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-57881\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-57881\nhttps://lore.kernel.org/linux-cve-announce/2025011146-CVE-2024-57881-7516@gregkh/T"], "threat_severity": "Moderate"}

{}