#VU104464 Use-after-free in Linux kernel - CVE-2022-49270

Vulnerability identifier: #VU104464

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-2022-49270

CWE-ID: CWE-416

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 use-after-free error within the cleanup_mapped_device() function in drivers/md/dm.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/0987f00a76a17aa7213da492c00ed9e5a6210c73
https://git.kernel.org/stable/c/43a043aed964659bc69ef81f266912b73c80d837
https://git.kernel.org/stable/c/588b7f5df0cb64f281290c7672470c006abe7160
https://git.kernel.org/stable/c/fdfe414ca28ddfd562c233fb27385cf820de03e8

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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.