{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31590",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.120Z",
        "datePublished": "2026-04-24T14:42:17.629Z",
        "dateUpdated": "2026-06-14T17:42:30.901Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-14T17:42:30.901Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Drop WARN on large size for KVM_MEMORY_ENCRYPT_REG_REGION\n\nDrop the WARN in sev_pin_memory() on npages overflowing an int, as the\nWARN is comically trivially to trigger from userspace, e.g. by doing:\n\n  struct kvm_enc_region range = {\n          .addr = 0,\n          .size = -1ul,\n  };\n\n  __vm_ioctl(vm, KVM_MEMORY_ENCRYPT_REG_REGION, &range);\n\nNote, the checks in sev_mem_enc_register_region() that presumably exist to\nverify the incoming address+size are completely worthless, as both \"addr\"\nand \"size\" are u64s and SEV is 64-bit only, i.e. they _can't_ be greater\nthan ULONG_MAX.  That wart will be cleaned up in the near future.\n\n\tif (range->addr > ULONG_MAX || range->size > ULONG_MAX)\n\t\treturn -EINVAL;\n\nOpportunistically add a comment to explain why the code calculates the\nnumber of pages the \"hard\" way, e.g. instead of just shifting @ulen."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/kvm/svm/sev.c"
                    ],
                    "versions": [
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "6a8e3c82122737529b25ef2a048fbcc569d8c055",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "a703933bcfa5cc76ca10e2048464600e74136099",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "abcd43ff579abd0a654bb4636086e78819dd5f4c",
                            "status": "affected",
                            "versionType": "git"
                        },
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                            "lessThan": "b670833749ffd8681361db2bb047c6f2e3075f3a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "ab423e5892826202a660b5ac85d1125b0e8301a5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "28cc13ca20431b127d42d84ba10898d03e2c8267",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "c29ff288a2d97a6f4640a498a367cf0eb91312eb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "1cba4dcd795daf6d257122779fb6a349edf03914",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "78824fabc72e5e37d51e6e567fde70a4fc41a6d7",
                            "lessThan": "8acffeef5ef720c35e513e322ab08e32683f32f2",
                            "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/x86/kvm/svm/sev.c"
                    ],
                    "versions": [
                        {
                            "version": "5.9",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.9",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.258",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.209",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.175",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.136",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.83",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.24",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.14",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.1",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "5.9",
                                    "versionEndExcluding": "5.10.258"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "5.15.209"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "6.1.175"
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                                    "versionEndExcluding": "6.19.14"
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                                    "versionStartIncluding": "5.9",
                                    "versionEndExcluding": "7.0.1"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/6a8e3c82122737529b25ef2a048fbcc569d8c055"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a703933bcfa5cc76ca10e2048464600e74136099"
                },
                {
                    "url": "https://git.kernel.org/stable/c/abcd43ff579abd0a654bb4636086e78819dd5f4c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b670833749ffd8681361db2bb047c6f2e3075f3a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ab423e5892826202a660b5ac85d1125b0e8301a5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/28cc13ca20431b127d42d84ba10898d03e2c8267"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c29ff288a2d97a6f4640a498a367cf0eb91312eb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1cba4dcd795daf6d257122779fb6a349edf03914"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8acffeef5ef720c35e513e322ab08e32683f32f2"
                }
            ],
            "title": "KVM: SEV: Drop WARN on large size for KVM_MEMORY_ENCRYPT_REG_REGION",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
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    }
}