#VU92931 Race condition in Linux kernel - CVE-2022-48759

Vulnerability identifier: #VU92931

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-2022-48759

CWE-ID: CWE-362

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 a race condition within the rpmsg_ctrldev_release_device(), rpmsg_chrdev_probe() and rpmsg_chrdev_remove() functions in drivers/rpmsg/rpmsg_char.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/74d85e9fbc7022a4011102c7474a9c7aeb704a35
https://git.kernel.org/stable/c/70cb4295ec806b663665e1d2ed15caab6159880e
https://git.kernel.org/stable/c/da27b834c1e0222e149e06caddf7718478086d1b
https://git.kernel.org/stable/c/1dbb206730f3e5ce90014ad569ddf8167ec4124a
https://git.kernel.org/stable/c/85aba11a8ea92a8eef2de95ebbe063086fd62d9c
https://git.kernel.org/stable/c/d6cdc6ae542845d4d0ac8b6d99362bde7042a3c7
https://git.kernel.org/stable/c/b7fb2dad571d1e21173c06cef0bced77b323990a

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.