Main Vulnerability Database Vulnerabilities #VU66544

Security restrictions bypass in Linux kernel - CVE-2022-2590

Published: August 16, 2022 / Updated: August 2, 2024

Vulnerability identifier: #VU66544

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-2590

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: Public exploit is available

Vulnerability details

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

The vulnerability exists due to improper access restrictions to shared memory (shmem / tmpfs). A local user can write to arbitrary files without having write permissions.

Affected software

Linux kernel
Ubuntu
linux-image-oem-22.04 (Ubuntu package)
linux-image-oem-22.04a (Ubuntu package)
linux-image-5.17.0-1031-oem (Ubuntu package)

How to mitigate CVE-2022-2590

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

linux-image-oem-22.04 (Ubuntu package) - update to 5.17.0.1031.29
linux-image-oem-22.04a (Ubuntu package) - update to 5.17.0.1031.29
linux-image-5.17.0-1031-oem (Ubuntu package) - update to 5.17.0-1031.32

Links to Public Exploits and PoC-codes

Exploit #10277 - CVE-2022-2590-analysis (Dirty COW restricted to shmem in linux kernel) (August 2, 2024)

External References

https://seclists.org/oss-sec/2022/q3/128