CVE-2022-49883

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{"bugzilla": {"description": "kernel: KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format", "id": "2363446", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363446"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nKVM: x86: smm: number of GPRs in the SMRAM image depends on the image format\nOn 64 bit host, if the guest doesn't have X86_FEATURE_LM, KVM will\naccess 16 gprs to 32-bit smram image, causing out-ouf-bound ram\naccess.\nOn 32 bit host, the rsm_load_state_64/enter_smm_save_state_64\nis compiled out, thus access overflow can't happen."], "name": "CVE-2022-49883", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49883\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49883\nhttps://lore.kernel.org/linux-cve-announce/2025050155-CVE-2022-49883-ba54@gregkh/T"], "statement": "A memory corruption vulnerability exists in the KVM x86 implementation, where the wrong number of General Purpose Registers (GPRs) is accessed in the System Management Mode (SMM) save/restore logic depending on guest architecture. On 64-bit hosts running 32-bit guests without the X86_FEATURE_LM feature, KVM may access out-of-bounds memory when reading or writing the SMRAM image, due to assuming a 64-bit GPR layout. This issue can only be triggered by a local, privileged guest user with access to SMM context or control over crafted guest state in a virtualized environment.", "threat_severity": "Moderate"}

{"created": "2025-06-24T09:44:14.337123+00:00", "updated": "2025-06-24T09:44:14.337187+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}