{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-46794", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.279Z", "datePublished": "2024-09-18T07:12:49.323Z", "dateUpdated": "2024-09-18T07:12:49.323Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-09-18T07:12:49.323Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/tdx: Fix data leak in mmio_read()\n\nThe mmio_read() function makes a TDVMCALL to retrieve MMIO data for an\naddress from the VMM.\n\nSean noticed that mmio_read() unintentionally exposes the value of an\ninitialized variable (val) on the stack to the VMM.\n\nThis variable is only needed as an output value. It did not need to be\npassed to the VMM in the first place.\n\nDo not send the original value of *val to the VMM.\n\n[ dhansen: clarify what 'val' is used for. ]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/coco/tdx/tdx.c"], "versions": [{"version": "31d58c4e557d", "lessThan": "26c6af49d26f", "status": "affected", "versionType": "git"}, {"version": "31d58c4e557d", "lessThan": "ef00818c50cf", "status": "affected", "versionType": "git"}, {"version": "31d58c4e557d", "lessThan": "b55ce742afcb", "status": "affected", "versionType": "git"}, {"version": "31d58c4e557d", "lessThan": "b6fb565a2d15", "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/coco/tdx/tdx.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "custom"}, {"version": "6.1.110", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.6.51", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.10.10", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.11", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7"}, {"url": "https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7"}, {"url": "https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa"}, {"url": "https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661"}], "title": "x86/tdx: Fix data leak in mmio_read()", "x_generator": {"engine": "bippy-c9c4e1df01b2"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/tdx: Fix data leak in mmio_read()\n\nThe mmio_read() function makes a TDVMCALL to retrieve MMIO data for an\naddress from the VMM.\n\nSean noticed that mmio_read() unintentionally exposes the value of an\ninitialized variable (val) on the stack to the VMM.\n\nThis variable is only needed as an output value. It did not need to be\npassed to the VMM in the first place.\n\nDo not send the original value of *val to the VMM.\n\n[ dhansen: clarify what 'val' is used for. ]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/tdx: Se corrige la fuga de datos en mmio_read() La funci\u00f3n mmio_read() realiza una TDVMCALL para recuperar datos MMIO para una direcci\u00f3n del VMM. Sean not\u00f3 que mmio_read() expone involuntariamente el valor de una variable inicializada (val) en la pila al VMM. Esta variable solo se necesita como valor de salida. No era necesario pasarla al VMM en primer lugar. No env\u00ede el valor original de *val al VMM. [ dhansen: aclare para qu\u00e9 se usa 'val'. ]"}], "id": "CVE-2024-46794", "lastModified": "2024-09-20T12:30:51.220", "metrics": {}, "published": "2024-09-18T08:15:06.230", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/26c6af49d26ffc377e392e30d4086db19eed0ef7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b55ce742afcb8e8189d82f2f1e635ba1b5a461fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b6fb565a2d15277896583d471b21bc14a0c99661"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef00818c50cf55a3a56bd9a9fae867c92dfb84e7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: x86/tdx: Fix data leak in mmio_read()", "id": "2313142", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2313142"}, "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": ["In the Linux kernel, the following vulnerability has been resolved:\nx86/tdx: Fix data leak in mmio_read()\nThe mmio_read() function makes a TDVMCALL to retrieve MMIO data for an\naddress from the VMM.\nSean noticed that mmio_read() unintentionally exposes the value of an\ninitialized variable (val) on the stack to the VMM.\nThis variable is only needed as an output value. It did not need to be\npassed to the VMM in the first place.\nDo not send the original value of *val to the VMM.\n[ dhansen: clarify what 'val' is used for. ]"], "name": "CVE-2024-46794", "package_state": [{"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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-09-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-46794\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-46794\nhttps://lore.kernel.org/linux-cve-announce/2024091854-CVE-2024-46794-9f64@gregkh/T"], "threat_severity": "Low"}