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CVE-2022-3910— Use after free in IO_uring 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，该漏洞源于存在内存释放后重用问题。攻击者利用该漏洞升级权限。

CVSS 7.8 · High EPSS 1.01% · P61

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2022-3910

Vulnerability Information
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Vulnerability Title
Use after free in IO_uring in the Linux Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
Use After Free vulnerability in Linux Kernel allows Privilege Escalation. An improper Update of Reference Count in io_uring leads to Use-After-Free and Local Privilege Escalation. When io_msg_ring was invoked with a fixed file, it called io_fput_file() which improperly decreased its reference count (leading to Use-After-Free and Local Privilege Escalation). Fixed files are permanently registered to the ring, and should not be put separately. We recommend upgrading past commit https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679 https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
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释放后重用问题。攻击者利用该漏洞升级权限。
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 5.18.0 ~ 5.19.10 -

II. Public POCs for CVE-2022-3910

# POC Description Source Link Shenlong Link
1 CVE-2022-3910 https://github.com/veritas501/CVE-2022-3910 POC Details
2 使用两种不同的角度实现对于CVE-2022-3910的利用 https://github.com/TLD1027/CVE-2022-3910 POC Details
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III. Intelligence Information for CVE-2022-3910

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Patches & Fixes for CVE-2022-3910 (1)

Other References for CVE-2022-3910 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2022-3910

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