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CVE-2021-47620— Bluetooth: refactor malicious adv data check

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 Bluetooth 模块重构恶意 adv 数据检查。

CVSS 8.1 · High EPSS 0.32% · P24

Affected Version Matrix 17

VendorProduct Version RangeStatus
Linux Linux 048acfa4daf167b007b6bd8bef474e90c2282a5f< 305e92f525450f3e1b5f5c9dc7eadb152d66a082 affected
7d4238edd3bf8b8c75571cc3b382bc10438ac588< 7889b38a7f21ed19314f83194622b195d328465c affected
185c77cbb53bc7481acc5a0b4e6119bbe393d561< 5a539c08d743d9910631448da78af5e961664c0e affected
4a1491432394b22e585a185ffca49086e4046aae< 8819f93cd4a443dfe547aa622b21f723757df3fb affected
24161b9c43de966789d5956428f45002d10f878e< 835d3706852537bf92eb23eb8635b8dee0c0aa67 affected
ffc9019bd991707701273c2e5d8aed472229fc4d< 83d5196b65d1b29e27d7dd16a3b9b439fb1d2dba affected
2de0e6a71ceb056e17e4684dce8b7640367996f9< bcea886771c3f22a590c8c8b9139a107bd7f1e1c affected
640a476e38fce6c70c738ac09e5167e34f570303< 5c968affa804ba98c3c603f37ffea6fba618025e affected
… +9 more rows
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I. Basic Information for CVE-2021-47620

Vulnerability Information
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Vulnerability Title
Bluetooth: refactor malicious adv data check
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: refactor malicious adv data check Check for out-of-bound read was being performed at the end of while num_reports loop, and would fill journal with false positives. Added check to beginning of loop processing so that it doesn't get checked after ptr has been advanced.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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 Bluetooth 模块重构恶意 adv 数据检查。
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 048acfa4daf167b007b6bd8bef474e90c2282a5f ~ 305e92f525450f3e1b5f5c9dc7eadb152d66a082 -
Linux Linux 4.4.300 ~ 4.4.302 -

II. Public POCs for CVE-2021-47620

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III. Intelligence Information for CVE-2021-47620

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Other References for CVE-2021-47620 (7)

Same Patch Batch · Linux · 2024-06-20 · 67 CVEs total

CVE-2022-48711 9.8 CRITICAL tipc: improve size validations for received domain records
CVE-2024-38620 8.8 HIGH Bluetooth: HCI: Remove HCI_AMP support
CVE-2022-48743 8.1 HIGH net: amd-xgbe: Fix skb data length underflow
CVE-2022-48729 7.8 HIGH IB/hfi1: Fix panic with larger ipoib send_queue_size
CVE-2022-48716 7.8 HIGH ASoC: codecs: wcd938x: fix incorrect used of portid
CVE-2022-48771 7.8 HIGH drm/vmwgfx: Fix stale file descriptors on failed usercopy
CVE-2022-48720 7.8 HIGH net: macsec: Fix offload support for NETDEV_UNREGISTER event
CVE-2022-48721 7.8 HIGH net/smc: Forward wakeup to smc socket waitqueue after fallback
CVE-2022-48762 7.8 HIGH arm64: extable: fix load_unaligned_zeropad() reg indices
CVE-2022-48726 7.8 HIGH RDMA/ucma: Protect mc during concurrent multicast leaves
CVE-2022-48759 7.8 HIGH rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev
CVE-2022-48733 7.8 HIGH btrfs: fix use-after-free after failure to create a snapshot
CVE-2022-48735 7.8 HIGH ALSA: hda: Fix UAF of leds class devs at unbinding
CVE-2022-48754 7.8 HIGH phylib: fix potential use-after-free
CVE-2022-48742 7.8 HIGH rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
CVE-2022-48751 7.8 HIGH net/smc: Transitional solution for clcsock race issue
CVE-2022-48744 7.5 HIGH net/mlx5e: Avoid field-overflowing memcpy()
CVE-2022-48727 7.3 HIGH KVM: arm64: Avoid consuming a stale esr value when SError occur
CVE-2022-48717 7.1 HIGH ASoC: max9759: fix underflow in speaker_gain_control_put()
CVE-2022-48739 7.1 HIGH ASoC: hdmi-codec: Fix OOB memory accesses

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47620

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