#VU104440 Use-after-free in Linux kernel - CVE-2022-49701

Vulnerability identifier: #VU104440

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-2022-49701

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 ibmvfc_npiv_logout(), ibmvfc_reenable_crq_queue(), ibmvfc_reset_crq(), ibmvfc_register_scsi_channel(), plpar_hcall_norets(), ibmvfc_deregister_scsi_channel() and ibmvfc_init_sub_crqs() functions in drivers/scsi/ibmvscsi/ibmvfc.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/161ec2a0807ddd58bc0f24f3e1e7e3d4fef5297f
https://git.kernel.org/stable/c/72ea7fe0db73d65c7d977208842d8ade9b823de9
https://git.kernel.org/stable/c/9f23c499ca601b2a1e1d2e761d03964b739bca0e

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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.