{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74524",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.911Z",
        "datePublished": "2026-08-15T12:27:41.735Z",
        "dateUpdated": "2026-08-17T05:21:07.108Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:21:07.108Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: mm: Fix out-of-bounds page-table walk during memory hot-remove\n\nremove_pud_mapping() and remove_p4d_mapping() obtain a child table base\nwith pud_offset(p4dp, 0) and p4d_offset(pgd, 0), then add the index for\naddr.\n\nRISC-V folds page-table levels at runtime. When a level is folded, its\noffset helper returns the parent entry itself, but the index can still be\nnonzero. Adding it walks past the parent table. Sv48 folds P4D, while Sv39\nfolds both P4D and PUD, so memory hot-remove can descend into unrelated\nmemory and pass an invalid page to __free_pages(). This can trigger:\n\n  kernel BUG at include/linux/mm.h:1810!\n  VM_BUG_ON_PAGE(page_ref_count(page) == 0)\n  arch_remove_memory+0x1e/0x5c\n  try_remove_memory+0x15e/0x200\n  remove_memory+0x24/0x3c\n\nOnly add the index when the corresponding page-table level is enabled,\nmatching p4d_offset() and pud_offset()."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/riscv/mm/init.c"
                    ],
                    "versions": [
                        {
                            "version": "c75a74f4ba19c904c0ae1e011ae2568449409ae4",
                            "lessThan": "1da6d832eda02d908df11a30ba6a856b98a3dd76",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c75a74f4ba19c904c0ae1e011ae2568449409ae4",
                            "lessThan": "54e07a158f7aea2754849d3a5a4cba1ac338ae7e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c75a74f4ba19c904c0ae1e011ae2568449409ae4",
                            "lessThan": "1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c75a74f4ba19c904c0ae1e011ae2568449409ae4",
                            "lessThan": "a0188cc133696627857d16054e43f9ebc7efc821",
                            "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/init.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.103",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.44",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.8",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.11",
                                    "versionEndExcluding": "6.12.103"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.18.44"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "7.1.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1da6d832eda02d908df11a30ba6a856b98a3dd76"
                },
                {
                    "url": "https://git.kernel.org/stable/c/54e07a158f7aea2754849d3a5a4cba1ac338ae7e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a0188cc133696627857d16054e43f9ebc7efc821"
                }
            ],
            "title": "riscv: mm: Fix out-of-bounds page-table walk during memory hot-remove",
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}