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    "cveMetadata": {
        "cveId": "CVE-2024-40915",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-07-12T12:17:45.581Z",
        "datePublished": "2024-07-12T12:24:58.770Z",
        "dateUpdated": "2024-09-11T17:34:39.270Z"
    },
    "containers": {
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                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-07-15T06:51:23.029Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: rewrite __kernel_map_pages() to fix sleeping in invalid context\n\n__kernel_map_pages() is a debug function which clears the valid bit in page\ntable entry for deallocated pages to detect illegal memory accesses to\nfreed pages.\n\nThis function set/clear the valid bit using __set_memory(). __set_memory()\nacquires init_mm's semaphore, and this operation may sleep. This is\nproblematic, because  __kernel_map_pages() can be called in atomic context,\nand thus is illegal to sleep. An example warning that this causes:\n\nBUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1578\nin_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2, name: kthreadd\npreempt_count: 2, expected: 0\nCPU: 0 PID: 2 Comm: kthreadd Not tainted 6.9.0-g1d4c6d784ef6 #37\nHardware name: riscv-virtio,qemu (DT)\nCall Trace:\n[<ffffffff800060dc>] dump_backtrace+0x1c/0x24\n[<ffffffff8091ef6e>] show_stack+0x2c/0x38\n[<ffffffff8092baf8>] dump_stack_lvl+0x5a/0x72\n[<ffffffff8092bb24>] dump_stack+0x14/0x1c\n[<ffffffff8003b7ac>] __might_resched+0x104/0x10e\n[<ffffffff8003b7f4>] __might_sleep+0x3e/0x62\n[<ffffffff8093276a>] down_write+0x20/0x72\n[<ffffffff8000cf00>] __set_memory+0x82/0x2fa\n[<ffffffff8000d324>] __kernel_map_pages+0x5a/0xd4\n[<ffffffff80196cca>] __alloc_pages_bulk+0x3b2/0x43a\n[<ffffffff8018ee82>] __vmalloc_node_range+0x196/0x6ba\n[<ffffffff80011904>] copy_process+0x72c/0x17ec\n[<ffffffff80012ab4>] kernel_clone+0x60/0x2fe\n[<ffffffff80012f62>] kernel_thread+0x82/0xa0\n[<ffffffff8003552c>] kthreadd+0x14a/0x1be\n[<ffffffff809357de>] ret_from_fork+0xe/0x1c\n\nRewrite this function with apply_to_existing_page_range(). It is fine to\nnot have any locking, because __kernel_map_pages() works with pages being\nallocated/deallocated and those pages are not changed by anyone else in the\nmeantime."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/riscv/mm/pageattr.c"
                    ],
                    "versions": [
                        {
                            "version": "5fde3db5eb02",
                            "lessThan": "919f8626099d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5fde3db5eb02",
                            "lessThan": "8661a7af0499",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5fde3db5eb02",
                            "lessThan": "d5257ceb19d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5fde3db5eb02",
                            "lessThan": "fb1cf0878328",
                            "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/mm/pageattr.c"
                    ],
                    "versions": [
                        {
                            "version": "5.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.7",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.1.95",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.6.35",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.9.6",
                            "lessThanOrEqual": "6.9.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.10",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/919f8626099d9909b9a9620b05e8c8ab06581876"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8661a7af04991201640863ad1a0983173f84b5eb"
                },
                {
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                },
                {
                    "url": "https://git.kernel.org/stable/c/fb1cf0878328fe75d47f0aed0a65b30126fcefc4"
                }
            ],
            "title": "riscv: rewrite __kernel_map_pages() to fix sleeping in invalid context",
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                            "content": {
                                "id": "CVE-2024-40915",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
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