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CVE-2021-47081— habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory

EPSS 0.03% · P10
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I. Basic Information for CVE-2021-47081

Vulnerability Information
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Vulnerability Title
habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory Our code analyzer reported a uaf. In gaudi_memset_device_memory, cb is get via hl_cb_kernel_create() with 2 refcount. If hl_cs_allocate_job() failed, the execution runs into release_cb branch. One ref of cb is dropped by hl_cb_put(cb) and could be freed if other thread also drops one ref. Then cb is used by cb->id later, which is a potential uaf. My patch add a variable 'id' to accept the value of cb->id before the hl_cb_put(cb) is called, to avoid the potential uaf.
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，该漏洞源于内存释放后重用。
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 423815bf02e257091d5337be5c63b57fc29e4254 ~ b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7 -
LinuxLinux 5.12 -

II. Public POCs for CVE-2021-47081

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III. Intelligence Information for CVE-2021-47081

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

CVE-2021-47080RDMA/core: Prevent divide-by-zero error triggered by the user
CVE-2021-47078RDMA/rxe: Clear all QP fields if creation failed
CVE-2021-47079platform/x86: ideapad-laptop: fix a NULL pointer dereference
CVE-2021-47077scsi: qedf: Add pointer checks in qedf_update_link_speed()
CVE-2021-47075nvmet: fix memory leak in nvmet_alloc_ctrl()
CVE-2021-47076RDMA/rxe: Return CQE error if invalid lkey was supplied
CVE-2021-47074nvme-loop: fix memory leak in nvme_loop_create_ctrl()
CVE-2021-47072btrfs: fix removed dentries still existing after log is synced
CVE-2021-47073platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios
CVE-2021-47071uio_hv_generic: Fix a memory leak in error handling paths
CVE-2021-47069ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
CVE-2021-47070uio_hv_generic: Fix another memory leak in error handling paths

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47081

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