{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40266", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.183Z", "datePublished": "2025-12-04T16:08:25.392Z", "dateUpdated": "2026-05-11T21:46:00.988Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:46:00.988Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Check the untrusted offset in FF-A memory share\n\nVerify the offset to prevent OOB access in the hypervisor\nFF-A buffer in case an untrusted large enough value\n[U32_MAX - sizeof(struct ffa_composite_mem_region) + 1, U32_MAX]\nis set from the host kernel."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kvm/hyp/nvhe/ffa.c"], "versions": [{"version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "fc3139d9f4c1fe1c7d5f25f99676bd8e9c6a1041", "status": "affected", "versionType": "git"}, {"version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "bc1909ef38788f2ee3d8011d70bf029948433051", "status": "affected", "versionType": "git"}, {"version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "f9f1aed6c8a3427900da3121e1868124854569c3", "status": "affected", "versionType": "git"}, {"version": "6211753fdfd05af9e08f54c8d0ba3ee516034878", "lessThan": "103e17aac09cdd358133f9e00998b75d6c1f1518", "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/kvm/hyp/nvhe/ffa.c"], "versions": [{"version": "3.11", "status": "affected"}, {"version": "0", "lessThan": "3.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.118", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.60", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.10", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "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": "3.11", "versionEndExcluding": "6.6.118"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.12.60"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.17.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fc3139d9f4c1fe1c7d5f25f99676bd8e9c6a1041"}, {"url": "https://git.kernel.org/stable/c/bc1909ef38788f2ee3d8011d70bf029948433051"}, {"url": "https://git.kernel.org/stable/c/f9f1aed6c8a3427900da3121e1868124854569c3"}, {"url": "https://git.kernel.org/stable/c/103e17aac09cdd358133f9e00998b75d6c1f1518"}], "title": "KVM: arm64: Check the untrusted offset in FF-A memory share", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Check the untrusted offset in FF-A memory share\n\nVerify the offset to prevent OOB access in the hypervisor\nFF-A buffer in case an untrusted large enough value\n[U32_MAX - sizeof(struct ffa_composite_mem_region) + 1, U32_MAX]\nis set from the host kernel."}], "id": "CVE-2025-40266", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-12-04T16:16:20.787", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/103e17aac09cdd358133f9e00998b75d6c1f1518"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc1909ef38788f2ee3d8011d70bf029948433051"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f9f1aed6c8a3427900da3121e1868124854569c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fc3139d9f4c1fe1c7d5f25f99676bd8e9c6a1041"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: KVM: arm64: Check the untrusted offset in FF-A memory share", "id": "2418884", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418884"}, "csaw": false, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nKVM: arm64: Check the untrusted offset in FF-A memory share\nVerify the offset to prevent OOB access in the hypervisor\nFF-A buffer in case an untrusted large enough value\n[U32_MAX - sizeof(struct ffa_composite_mem_region) + 1, U32_MAX]\nis set from the host kernel."], "name": "CVE-2025-40266", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "2025-12-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40266\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40266\nhttps://lore.kernel.org/linux-cve-announce/2025120435-CVE-2025-40266-30a1@gregkh/T"]}

{}