CVE-2022-3621— Linux Kernel nilfs2 inode.c nilfs_bmap_lookup_at_level null pointer dereference
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 存在安全漏洞，该漏洞源于nilfs2组件中fs/nilfs2/inode.c文件的nilfs_bmap_lookup_at_level函数存在问题，可能导致空指针取消引用。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-3621
Vulnerability Information
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Vulnerability Title
Linux Kernel nilfs2 inode.c nilfs_bmap_lookup_at_level null pointer dereference
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Linux Kernel. It has been classified as problematic. Affected is the function nilfs_bmap_lookup_at_level of the file fs/nilfs2/inode.c of the component nilfs2. The manipulation leads to null pointer dereference. It is possible to launch the attack remotely. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-211920.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 代码问题漏洞
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 存在安全漏洞，该漏洞源于nilfs2组件中fs/nilfs2/inode.c文件的nilfs_bmap_lookup_at_level函数存在问题，可能导致空指针取消引用。
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-2022-3621
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Patches & Fixes for CVE-2022-3621 (1)
Mailing List Discussions for CVE-2022-3621 (2)
Same Patch Batch · Linux · 2022-10-20 · 3 CVEs total
| CVE-2022-3623 | 5.0 MEDIUM | Linux Kernel BPF gup.c follow_page_pte race condition |
| 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-2022-3621
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