{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-39823", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.139Z", "datePublished": "2025-09-16T13:00:22.298Z", "dateUpdated": "2025-09-16T13:00:22.298Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-16T13:00:22.298Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: use array_index_nospec with indices that come from guest\n\nmin and dest_id are guest-controlled indices. Using array_index_nospec()\nafter the bounds checks clamps these values to mitigate speculative execution\nside-channels."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/lapic.c", "arch/x86/kvm/x86.c"], "versions": [{"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48", "status": "affected", "versionType": "git"}, {"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "31a0ad2f60cb4816e06218b63e695eb72ce74974", "status": "affected", "versionType": "git"}, {"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "d51e381beed5e2f50f85f49f6c90e023754efa12", "status": "affected", "versionType": "git"}, {"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985f", "status": "affected", "versionType": "git"}, {"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "f49161646e03d107ce81a99c6ca5da682fe5fb69", "status": "affected", "versionType": "git"}, {"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "67a05679621b7f721bdba37a5d18665d3aceb695", "status": "affected", "versionType": "git"}, {"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "f57a4bd8d6cb5af05b8ac1be9098e249034639fb", "status": "affected", "versionType": "git"}, {"version": "4180bf1b655a791a0a6ef93a2ffffc762722c782", "lessThan": "c87bd4dd43a624109c3cc42d843138378a7f4548", "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/lapic.c", "arch/x86/kvm/x86.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.298", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.242", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.191", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.150", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.104", "lessThanOrEqual": "6.6.*", "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": "4.19", "versionEndExcluding": "5.4.298"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.10.242"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.15.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.1.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.16.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.17-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48"}, {"url": "https://git.kernel.org/stable/c/31a0ad2f60cb4816e06218b63e695eb72ce74974"}, {"url": "https://git.kernel.org/stable/c/d51e381beed5e2f50f85f49f6c90e023754efa12"}, {"url": "https://git.kernel.org/stable/c/33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985f"}, {"url": "https://git.kernel.org/stable/c/f49161646e03d107ce81a99c6ca5da682fe5fb69"}, {"url": "https://git.kernel.org/stable/c/67a05679621b7f721bdba37a5d18665d3aceb695"}, {"url": "https://git.kernel.org/stable/c/f57a4bd8d6cb5af05b8ac1be9098e249034639fb"}, {"url": "https://git.kernel.org/stable/c/c87bd4dd43a624109c3cc42d843138378a7f4548"}], "title": "KVM: x86: use array_index_nospec with indices that come from guest", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: use array_index_nospec with indices that come from guest\n\nmin and dest_id are guest-controlled indices. Using array_index_nospec()\nafter the bounds checks clamps these values to mitigate speculative execution\nside-channels."}], "id": "CVE-2025-39823", "lastModified": "2025-09-17T14:18:55.093", "metrics": {}, "published": "2025-09-16T13:16:00.397", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/31a0ad2f60cb4816e06218b63e695eb72ce74974"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33e974c2d5a82b2f9d9ba0ad9cbaabc1c8e3985f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/67a05679621b7f721bdba37a5d18665d3aceb695"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/72777fc31aa7ab2ce00f44bfa3929c6eabbeaf48"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c87bd4dd43a624109c3cc42d843138378a7f4548"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d51e381beed5e2f50f85f49f6c90e023754efa12"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f49161646e03d107ce81a99c6ca5da682fe5fb69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f57a4bd8d6cb5af05b8ac1be9098e249034639fb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: KVM: x86: use array_index_nospec with indices that come from guest", "id": "2395804", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395804"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-39823", "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": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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-2025-39823\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39823\nhttps://lore.kernel.org/linux-cve-announce/2025091616-CVE-2025-39823-f9bf@gregkh/T"], "threat_severity": "Moderate"}