{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-39815", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.138Z", "datePublished": "2025-09-16T13:00:16.250Z", "dateUpdated": "2025-09-16T13:00:16.250Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-16T13:00:16.250Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRISC-V: KVM: fix stack overrun when loading vlenb\n\nThe userspace load can put up to 2048 bits into an xlen bit stack\nbuffer. We want only xlen bits, so check the size beforehand."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/riscv/kvm/vcpu_vector.c"], "versions": [{"version": "2fa290372dfe7dd248b1c16f943f273a3e674f22", "lessThan": "c76bf8359188a11f8fd790e5bbd6077894a245cc", "status": "affected", "versionType": "git"}, {"version": "2fa290372dfe7dd248b1c16f943f273a3e674f22", "lessThan": "6d28659b692a0212f360f8bd8a58712b339f9aac", "status": "affected", "versionType": "git"}, {"version": "2fa290372dfe7dd248b1c16f943f273a3e674f22", "lessThan": "799766208f09f95677a9ab111b93872d414fbad7", "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/kvm/vcpu_vector.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.45", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.5", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17-rc4", "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": "6.8", "versionEndExcluding": "6.12.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.16.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.17-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c76bf8359188a11f8fd790e5bbd6077894a245cc"}, {"url": "https://git.kernel.org/stable/c/6d28659b692a0212f360f8bd8a58712b339f9aac"}, {"url": "https://git.kernel.org/stable/c/799766208f09f95677a9ab111b93872d414fbad7"}], "title": "RISC-V: KVM: fix stack overrun when loading vlenb", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRISC-V: KVM: fix stack overrun when loading vlenb\n\nThe userspace load can put up to 2048 bits into an xlen bit stack\nbuffer. We want only xlen bits, so check the size beforehand."}], "id": "CVE-2025-39815", "lastModified": "2025-09-16T13:15:56.240", "metrics": {}, "published": "2025-09-16T13:15:56.240", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6d28659b692a0212f360f8bd8a58712b339f9aac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/799766208f09f95677a9ab111b93872d414fbad7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c76bf8359188a11f8fd790e5bbd6077894a245cc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: RISC-V: KVM: fix stack overrun when loading vlenb", "id": "2395789", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395789"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-39815", "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": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39815\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39815\nhttps://lore.kernel.org/linux-cve-announce/2025091615-CVE-2025-39815-a663@gregkh/T"], "threat_severity": "Moderate"}