#VU90191 Use-after-free in Linux kernel - CVE-2022-48666

Vulnerability identifier: #VU90191

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-2022-48666

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 __scsi_remove_device() function in drivers/scsi/scsi_sysfs.c, within the scsi_alloc_sdev() function in drivers/scsi/scsi_scan.c, within the scsi_mq_setup_tags() function in drivers/scsi/scsi_lib.c, within the scsi_remove_host(), scsi_add_host_with_dma() and scsi_host_dev_release() functions in drivers/scsi/hosts.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/2e7eb4c1e8af8385de22775bd0be552f59b28c9a
https://git.kernel.org/stable/c/8fe4ce5836e932f5766317cb651c1ff2a4cd0506

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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.