#VU96413 Use-after-free in Linux kernel - CVE-2022-48919

Vulnerability identifier: #VU96413

Vulnerability risk: Low

CVSSv4.0: [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-2022-48919

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 cifs_do_mount() function in fs/cifs/cifsfs.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
http://git.kernel.org/stable/c/da834d6c1147c7519a9e55b510a03b7055104749
http://git.kernel.org/stable/c/147a0e71ccf96df9fc8c2ac500829d8e423ef02c
http://git.kernel.org/stable/c/2fe0e281f7ad0a62259649764228227dd6b2561d
http://git.kernel.org/stable/c/e208668ef7ba23efcbf76a8200cab8deee501c4d
http://git.kernel.org/stable/c/df9db1a2af37f39ad1653c7b9b0d275d72d0bc67
http://git.kernel.org/stable/c/546d60859ecf13380fcabcbeace53a5971493a2b
http://git.kernel.org/stable/c/563431c1f3c8f2230e4a9c445fa23758742bc4f0
http://git.kernel.org/stable/c/3d6cc9898efdfb062efb74dc18cfc700e082f5d5

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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.