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CVE-2021-47062— KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs

EPSS 0.02% · P5
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I. Basic Information for CVE-2021-47062

Vulnerability Information
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Vulnerability Title
KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs Use the kvm_for_each_vcpu() helper to iterate over vCPUs when encrypting VMSAs for SEV, which effectively switches to use online_vcpus instead of created_vcpus. This fixes a possible null-pointer dereference as created_vcpus does not guarantee a vCPU exists, since it is updated at the very beginning of KVM_CREATE_VCPU. created_vcpus exists to allow the bulk of vCPU creation to run in parallel, while still correctly restricting the max number of max vCPUs.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux ad73109ae7ec30d5bfb76be108e304f9f0af4829 ~ bd0cced2ae93195668f983d443f7f17e8efd24d2 -
LinuxLinux 5.11 -

II. Public POCs for CVE-2021-47062

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III. Intelligence Information for CVE-2021-47062

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Same Patch Batch · Linux · 2024-02-29 · 53 CVEs total

CVE-2021-47016m68k: mvme147,mvme16x: Don't wipe PCC timer config bits
CVE-2021-47068net/nfc: fix use-after-free llcp_sock_bind/connect
CVE-2021-47067soc/tegra: regulators: Fix locking up when voltage-spread is out of range
CVE-2021-47061KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
CVE-2021-47065rtw88: Fix array overrun in rtw_get_tx_power_params()
CVE-2021-47064mt76: fix potential DMA mapping leak
CVE-2021-47063drm: bridge/panel: Cleanup connector on bridge detach
CVE-2021-47066async_xor: increase src_offs when dropping destination page
CVE-2021-47054bus: qcom: Put child node before return
CVE-2021-47020soundwire: stream: fix memory leak in stream config error path
CVE-2021-47055mtd: require write permissions for locking and badblock ioctls
CVE-2021-46959spi: Fix use-after-free with devm_spi_alloc_*
CVE-2024-26620s390/vfio-ap: always filter entire AP matrix
CVE-2024-26619riscv: Fix module loading free order
CVE-2024-26618arm64/sme: Always exit sme_alloc() early with existing storage
CVE-2024-26617fs/proc/task_mmu: move mmu notification mechanism inside mm lock
CVE-2024-26616btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned
CVE-2024-26615net/smc: fix illegal rmb_desc access in SMC-D connection dump
CVE-2024-26614tcp: make sure init the accept_queue's spinlocks once
CVE-2024-26612netfs, fscache: Prevent Oops in fscache_put_cache()

Showing top 20 of 53 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47062

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