{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53200",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.391Z",
        "datePublished": "2026-06-25T08:39:08.968Z",
        "dateUpdated": "2026-08-05T12:34:03.957Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:34:03.957Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX\n\nXN has already been extracted from its bitfield position so using\nFIELD_PREP() on the mask that clears XN[0] is completely broken, having\nthe effect of unconditionally granting execute permissions...\n\nFix the obvious mistake by manipulating the right bit."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable KVM arm64 nested-virtualization path is reached by local KVM ioctls and guest execution through /dev/kvm, not by network packets or physical access.\nAC:L - Once nested virtualization is available and FEAT_XNX is absent or not exposed, the faulty mask deterministically treats nested stage-2 translations as executable. The attacker controls the guest execution and the relevant nested stage-2 descriptors in the practical attack setup.\nPR:L - The attacker needs local ability to create/run a KVM VM with nested EL2 enabled, but the traced ioctl path does not require real root or CAP_SYS_ADMIN. This is low privilege rather than high privilege.\nUI:N - No victim action is required after the attacker can run the nested VM; execution faults and shadow stage-2 mappings are handled automatically by KVM.\nS:C - The bug is in the host KVM enforcement of L1-controlled stage-2 execute permissions and can let an L2 guest violate the L1 hypervisor's security policy. That crosses a virtualization security boundary.\nC:H - By bypassing L1-enforced execute-never/W^X policy, an attacker can plausibly gain arbitrary execution in a protected nested guest context and read data protected by that policy. There is no host memory-corruption primitive, but the crossed nested-virtualization boundary supports high confidentiality impact.\nI:H - The flaw directly grants execute permission where the L1 stage-2 page tables intended to deny it. This can allow attacker-controlled code execution and full integrity compromise of the protected nested guest context.\nA:H - Arbitrary execution after bypassing the nested execute restriction can be used to crash or halt the protected guest/security domain. No host kernel panic is required for high availability impact across that boundary."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/arm64/include/asm/kvm_nested.h"
                    ],
                    "versions": [
                        {
                            "version": "d93febe2ed2e0491af9d47f0ee6d4b01918877f4",
                            "lessThan": "b95976c2ea446044553a5f469c0bae13553d75ab",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d93febe2ed2e0491af9d47f0ee6d4b01918877f4",
                            "lessThan": "49b32ddb87a3a109afecea89e55d70f73956b8bc",
                            "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/arm64/include/asm/kvm_nested.h"
                    ],
                    "versions": [
                        {
                            "version": "6.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.13",
                            "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": "6.19",
                                    "versionEndExcluding": "7.0.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.19",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b95976c2ea446044553a5f469c0bae13553d75ab"
                },
                {
                    "url": "https://git.kernel.org/stable/c/49b32ddb87a3a109afecea89e55d70f73956b8bc"
                }
            ],
            "title": "KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}