#VU91055 Use-after-free in Linux kernel - CVE-2023-52846

Vulnerability identifier: #VU91055

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-2023-52846

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 prp_create_tagged_frame() function in net/hsr/hsr_forward.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/ddf4e04e946aaa6c458b8b6829617cc44af2bffd
https://git.kernel.org/stable/c/a1a485e45d24b1cd8fe834fd6f1b06e2903827da
https://git.kernel.org/stable/c/6086258bd5ea7b5c706ff62da42b8e271b2401db
https://git.kernel.org/stable/c/1787b9f0729d318d67cf7c5a95f0c3dba9a7cc18
https://git.kernel.org/stable/c/d103fb6726904e353b4773188ee3d3acb4078363
https://git.kernel.org/stable/c/876f8ab52363f649bcc74072157dfd7adfbabc0d

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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.