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CVE-2021-47064— mt76: fix potential DMA mapping leak

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，该漏洞源于存在潜在的 DMA 映射泄漏。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 27d5c528a7ca08dcd44877fdd9fc08b76630bf77< 9fa26701cd1fc4d932d431971efc5746325bdfce affected
27d5c528a7ca08dcd44877fdd9fc08b76630bf77< 9b68ce2856dadc0e1cb6fd21fbeb850da49efd08 affected
27d5c528a7ca08dcd44877fdd9fc08b76630bf77< 91b9548d413fda488ea853cd1b9f59b572db3a0c affected
27d5c528a7ca08dcd44877fdd9fc08b76630bf77< b4403cee6400c5f679e9c4a82b91d61aa961eccf affected
5.10 affected
< 5.10 unaffected
5.10.37≤ 5.10.* unaffected
5.11.21≤ 5.11.* unaffected
… +2 more rows
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I. Basic Information for CVE-2021-47064

Vulnerability Information
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Vulnerability Title
mt76: fix potential DMA mapping leak
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mt76: fix potential DMA mapping leak With buf uninitialized in mt76_dma_tx_queue_skb_raw, its field skip_unmap could potentially inherit a non-zero value from stack garbage. If this happens, it will cause DMA mappings for MCU command frames to not be unmapped after completion
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，该漏洞源于存在潜在的 DMA 映射泄漏。
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 27d5c528a7ca08dcd44877fdd9fc08b76630bf77 ~ 9fa26701cd1fc4d932d431971efc5746325bdfce -
Linux Linux 5.10 -

II. Public POCs for CVE-2021-47064

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III. Intelligence Information for CVE-2021-47064

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Other References for CVE-2021-47064 (3)

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

CVE-2023-52480 9.8 CRITICAL ksmbd: fix race condition between session lookup and expire
CVE-2023-52478 8.8 HIGH HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect
CVE-2023-52479 8.8 HIGH ksmbd: fix uaf in smb20_oplock_break_ack
CVE-2024-26620 8.2 HIGH s390/vfio-ap: always filter entire AP matrix
CVE-2021-47068 7.8 HIGH net/nfc: fix use-after-free llcp_sock_bind/connect
CVE-2023-52491 7.8 HIGH media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_
CVE-2024-26608 7.8 HIGH ksmbd: fix global oob in ksmbd_nl_policy
CVE-2023-52486 7.8 HIGH drm: Don't unref the same fb many times by mistake due to deadlock handling
CVE-2024-26610 7.8 HIGH wifi: iwlwifi: fix a memory corruption
CVE-2024-26614 7.8 HIGH tcp: make sure init the accept_queue's spinlocks once
CVE-2024-26617 7.8 HIGH fs/proc/task_mmu: move mmu notification mechanism inside mm lock
CVE-2023-52483 7.8 HIGH mctp: perform route lookups under a RCU read-side lock
CVE-2021-47060 7.8 HIGH KVM: Stop looking for coalesced MMIO zones if the bus is destroyed
CVE-2021-47061 7.8 HIGH KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
CVE-2024-26611 7.5 HIGH xsk: fix usage of multi-buffer BPF helpers for ZC XDP
CVE-2021-47066 7.1 HIGH async_xor: increase src_offs when dropping destination page
CVE-2021-47055 7.1 HIGH mtd: require write permissions for locking and badblock ioctls
CVE-2023-52497 7.1 HIGH erofs: fix lz4 inplace decompression
CVE-2021-47057 crypto: sun8i-ss - Fix memory leak of object d when dma_iv fails to map
CVE-2021-47058 regmap: set debugfs_name to NULL after it is freed

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47064

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