#VU104437 Use-after-free in Linux kernel - CVE-2022-49730

Vulnerability identifier: #VU104437

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-2022-49730

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_cmpl_els_logo(), lpfc_els_free_iocb() and lpfc_disc_state_machine() 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/5e83869e29448958f8ae2c6911f350318f75e4fc
https://git.kernel.org/stable/c/b1b3440f437b75fb2a9b0cfe58df461e40eca474
https://git.kernel.org/stable/c/eea34ce23dc3a595695856dc73bb132a9c5a2902

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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.