CVE-2026-53200

{"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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/arm64/include/asm/kvm_nested.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b95976c2ea446044553a5f469c0bae13553d75ab", "status": "affected", "version": "d93febe2ed2e0491af9d47f0ee6d4b01918877f4", "versionType": "git"}, {"lessThan": "49b32ddb87a3a109afecea89e55d70f73956b8bc", "status": "affected", "version": "d93febe2ed2e0491af9d47f0ee6d4b01918877f4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/arm64/include/asm/kvm_nested.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E", "versionEndExcluding": "7.0.13", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*", "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*", "matchCriteriaId": "81DFF19E-9CF8-49C6-8C36-1E4038622933", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*", "matchCriteriaId": "B0E8FC71-3952-444C-83E9-718DBBBEC615", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}], "id": "CVE-2026-53200", "lastModified": "2026-07-06T12:32:25.270", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-06-25T09:16:37.577", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49b32ddb87a3a109afecea89e55d70f73956b8bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b95976c2ea446044553a5f469c0bae13553d75ab"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: KVM: arm64: nv: Fix handling of XN[0] when !FEAT_XNX", "id": "2492799", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492799"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-266", "details": ["A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for ARM64 architectures. This vulnerability arises from incorrect handling of the Execute Never (XN) bit, a memory protection feature, when the FEAT_XNX feature is not enabled. This error can lead to execute permissions being unconditionally granted, potentially allowing a local attacker to execute arbitrary code with elevated privileges."], "name": "CVE-2026-53200", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53200\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53200\nhttps://lore.kernel.org/linux-cve-announce/2026062500-CVE-2026-53200-8066@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d93febe2ed2e0491af9d47f0ee6d4b01918877f4,b95976c2ea446044553a5f469c0bae13553d75ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d93febe2ed2e0491af9d47f0ee6d4b01918877f4,49b32ddb87a3a109afecea89e55d70f73956b8bc)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.13,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-25T11:45:03.801440+00:00", "updated": "2026-08-12T08:30:16.966530+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}