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CVE-2021-47071— uio_hv_generic: Fix a memory leak in error handling paths

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于存在内存泄漏问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.24% · P13

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux cdfa835c6e5e87d145f9f632b58843de97509f2b< cdd91637d4ef33e2be19a8e16e72e7d00c996d76 affected
cdfa835c6e5e87d145f9f632b58843de97509f2b< d84b5e912212b05f6b5bde9f682046accfbe0354 affected
cdfa835c6e5e87d145f9f632b58843de97509f2b< 53486c467e356e06aa37047c984fccd64d78c827 affected
cdfa835c6e5e87d145f9f632b58843de97509f2b< 3ee098f96b8b6c1a98f7f97915f8873164e6af9d affected
4.20 affected
< 4.20 unaffected
5.4.122≤ 5.4.* unaffected
5.10.40≤ 5.10.* unaffected
… +2 more rows
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I. Basic Information for CVE-2021-47071

Vulnerability Information
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Vulnerability Title
uio_hv_generic: Fix a memory leak in error handling paths
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Fix a memory leak in error handling paths If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not be updated and 'hv_uio_cleanup()' in the error handling path will not be able to free the corresponding buffer. In such a case, we need to free the buffer explicitly.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于存在内存泄漏问题。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux cdfa835c6e5e87d145f9f632b58843de97509f2b ~ cdd91637d4ef33e2be19a8e16e72e7d00c996d76 -
Linux Linux 4.20 -

II. Public POCs for CVE-2021-47071

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III. Intelligence Information for CVE-2021-47071

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Other References for CVE-2021-47071 (4)

Same Patch Batch · Linux · 2024-03-01 · 13 CVEs total

CVE-2021-47081 7.8 HIGH habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory
CVE-2021-47078 7.8 HIGH RDMA/rxe: Clear all QP fields if creation failed
CVE-2021-47069 7.8 HIGH ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
CVE-2021-47080 RDMA/core: Prevent divide-by-zero error triggered by the user
CVE-2021-47079 platform/x86: ideapad-laptop: fix a NULL pointer dereference
CVE-2021-47077 scsi: qedf: Add pointer checks in qedf_update_link_speed()
CVE-2021-47075 nvmet: fix memory leak in nvmet_alloc_ctrl()
CVE-2021-47076 RDMA/rxe: Return CQE error if invalid lkey was supplied
CVE-2021-47074 nvme-loop: fix memory leak in nvme_loop_create_ctrl()
CVE-2021-47072 btrfs: fix removed dentries still existing after log is synced
CVE-2021-47073 platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios
CVE-2021-47070 uio_hv_generic: Fix another memory leak in error handling paths

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47071

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