CVE-2022-3623— Linux Kernel BPF gup.c follow_page_pte race condition
Quick assessment
Affected
Linux Kernel
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 存在竞争条件问题漏洞，该漏洞源于BPF组件中mm/gup.c文件的follow_page_pte函数存在问题，可能导致竞争条件。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2022-3623
Vulnerability Information
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Vulnerability Title
Linux Kernel BPF gup.c follow_page_pte race condition
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Linux Kernel. It has been declared as problematic. Affected by this vulnerability is the function follow_page_pte of the file mm/gup.c of the component BPF. The manipulation leads to race condition. The attack can be launched remotely. It is recommended to apply a patch to fix this issue. The identifier VDB-211921 was assigned to this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 竞争条件问题漏洞
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 存在竞争条件问题漏洞，该漏洞源于BPF组件中mm/gup.c文件的follow_page_pte函数存在问题，可能导致竞争条件。
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
II. Public POCs for CVE-2022-3623
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Patches & Fixes for CVE-2022-3623 (1)
Vendor Advisories for CVE-2022-3623 (2)
-
https://www.debian.org/security/2023/dsa-5324 vendor-advisory
Mailing List Discussions for CVE-2022-3623 (1)
Same Patch Batch · Linux · 2022-10-20 · 3 CVEs total
| CVE-2022-3621 | 4.3 MEDIUM | Linux Kernel nilfs2 inode.c nilfs_bmap_lookup_at_level null pointer dereference |
| CVE-2022-3619 | 3.5 LOW | Linux Kernel Bluetooth l2cap_core.c l2cap_recv_acldata memory leak |
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V. Comments for CVE-2022-3623
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