{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-26947",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses\n\nSince commit a4d5613c4dc6 (\"arm: extend pfn_valid to take into account\nfreed memory map alignment\") changes the semantics of pfn_valid() to check\npresence of the memory map for a PFN. A valid page for an address which\nis reserved but not mapped by the kernel[1], the system crashed during\nsome uio test with the following memory layout:\n\n node   0: [mem 0x00000000c0a00000-0x00000000cc8fffff]\n node   0: [mem 0x00000000d0000000-0x00000000da1fffff]\n the uio layout is\uff1a0xc0900000, 0x100000\n\nthe crash backtrace like:\n\n  Unable to handle kernel paging request at virtual address bff00000\n  [...]\n  CPU: 1 PID: 465 Comm: startapp.bin Tainted: G           O      5.10.0 #1\n  Hardware name: Generic DT based system\n  PC is at b15_flush_kern_dcache_area+0x24/0x3c\n  LR is at __sync_icache_dcache+0x6c/0x98\n  [...]\n   (b15_flush_kern_dcache_area) from (__sync_icache_dcache+0x6c/0x98)\n   (__sync_icache_dcache) from (set_pte_at+0x28/0x54)\n   (set_pte_at) from (remap_pfn_range+0x1a0/0x274)\n   (remap_pfn_range) from (uio_mmap+0x184/0x1b8 [uio])\n   (uio_mmap [uio]) from (__mmap_region+0x264/0x5f4)\n   (__mmap_region) from (__do_mmap_mm+0x3ec/0x440)\n   (__do_mmap_mm) from (do_mmap+0x50/0x58)\n   (do_mmap) from (vm_mmap_pgoff+0xfc/0x188)\n   (vm_mmap_pgoff) from (ksys_mmap_pgoff+0xac/0xc4)\n   (ksys_mmap_pgoff) from (ret_fast_syscall+0x0/0x5c)\n  Code: e0801001 e2423001 e1c00003 f57ff04f (ee070f3e)\n  ---[ end trace 09cf0734c3805d52 ]---\n  Kernel panic - not syncing: Fatal exception\n\nSo check if PG_reserved was set to solve this issue.\n\n[1]: https://lore.kernel.org/lkml/Zbtdue57RO0QScJM@linux.ibm.com/"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "a4d5613c4dc6",
                                            "version_value": "0c027c2bad7f"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.14",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.14",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.24",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.7.12",
                                                        "lessThanOrEqual": "6.7.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.8.3",
                                                        "lessThanOrEqual": "6.8.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.9",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/0c027c2bad7f5111c51a358b5d392e1a695dabff",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/0c027c2bad7f5111c51a358b5d392e1a695dabff"
            },
            {
                "url": "https://git.kernel.org/stable/c/9f7ddc222cae8254e93d5c169a8ae11a49d912a7",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/9f7ddc222cae8254e93d5c169a8ae11a49d912a7"
            },
            {
                "url": "https://git.kernel.org/stable/c/fb3a122a978626b33de3367ee1762da934c0f512",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/fb3a122a978626b33de3367ee1762da934c0f512"
            },
            {
                "url": "https://git.kernel.org/stable/c/0c66c6f4e21cb22220cbd8821c5c73fc157d20dc",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/0c66c6f4e21cb22220cbd8821c5c73fc157d20dc"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
    }
}