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CVE-2022-42896— Info Leak in l2cap_core in the Linux Kernel

Quick assessment

Affected
Linux Linux Kernel
Exploitation
Public or AI PoC available; prioritize validation
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。攻击者利用该漏洞通过Bluetooth L2CAP无效的SPSM绕过Linux kernel的过滤规则，以发送恶意数据。

CVSS 8.0 · High EPSS 2.01% · P79
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I. Basic Information for CVE-2022-42896

Vulnerability Information
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Vulnerability Title
Info Leak in l2cap_core in the Linux Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
There are use-after-free vulnerabilities in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_connect and l2cap_le_connect_req functions which may allow code execution and leaking kernel memory (respectively) remotely via Bluetooth. A remote attacker could execute code leaking kernel memory via Bluetooth if within proximity of the victim. We recommend upgrading past commit  https://www.google.com/url https://github.com/torvalds/linux/commit/711f8c3fb3db61897080468586b970c87c61d9e4 https://www.google.com/url
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 资源管理错误漏洞
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。攻击者利用该漏洞通过Bluetooth L2CAP无效的SPSM绕过Linux kernel的过滤规则，以发送恶意数据。
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 Kernel 3.0.0 ~ 711f8c3fb3db61897080468586b970c87c61d9e4 -

II. Public POCs for CVE-2022-42896

# POC Description Source Link Shenlong Link
1 None https://github.com/Satheesh575555/linux-4.19.72_CVE-2022-42896 POC Details
2 None https://github.com/hshivhare67/kernel_v4.19.72_CVE-2022-42896_old POC Details
3 None https://github.com/Trinadh465/linux-4.19.72_CVE-2022-42896 POC Details
4 None https://github.com/hshivhare67/kernel_v4.19.72_CVE-2022-42896_new POC Details
5 None https://github.com/himanshu667/kernel_v4.19.72_CVE-2022-42896 POC Details
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III. Intelligence Information for CVE-2022-42896

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Patches & Fixes for CVE-2022-42896 (1)

Other References for CVE-2022-42896 (1)

IV. Related Vulnerabilities

Same product: Linux Kernel
Same vendor: Linux
Same weakness: CWE-416

V. Comments for CVE-2022-42896

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