#VU104456 Use-after-free in Linux kernel - CVE-2022-49535

Vulnerability identifier: #VU104456

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-2022-49535

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 lpfc_initial_flogi(), lpfc_initial_fdisc(), lpfc_cmpl_els_plogi(), lpfc_cmpl_els_prli() and lpfc_cmpl_els_adisc() functions in drivers/scsi/lpfc/lpfc_els.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/10663ebec0ad5c78493a0dd34c9ee4d73d7ca0df
https://git.kernel.org/stable/c/577a942df3de2666f6947bdd3a5c9e8d30073424

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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.