#VU111628 Buffer overflow in Linux kernel - CVE-2022-50020

Vulnerability identifier: #VU111628

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-50020

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to memory corruption within the ext4_resize_fs() function in fs/ext4/resize.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: 5.4 - 5.4.210

---

External links
https://git.kernel.org/stable/c/0082e99a9074ff88eff729c70c93454c8588d8e1
https://git.kernel.org/stable/c/53f62a4201be1cfc1e3c971e566888b182c3ffb0
https://git.kernel.org/stable/c/69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd
https://git.kernel.org/stable/c/72b850a2a996f72541172e7cf686d54a2b29bcd8
https://git.kernel.org/stable/c/7bdfb01fc5f6b3696728aeb527c50386e0ee09a1
https://git.kernel.org/stable/c/80288883294c5b4ed18bae0d8bd9c4a12f297074
https://git.kernel.org/stable/c/952b3dc02baaae6a69c71c0aca23e06741182d9a
https://git.kernel.org/stable/c/a6805b3dcf5cd41f2ae3a03dca43411135b99849
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.211

---

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?