#VU90550 NULL pointer dereference in Linux kernel - CVE-2023-52696

Vulnerability identifier: #VU90550

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52696

CWE-ID: CWE-476

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 perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the opal_powercap_init() function in arch/powerpc/platforms/powernv/opal-powercap.c. A local user can perform a denial of service (DoS) attack.

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/9da4a56dd3772570512ca58aa8832b052ae910dc
https://git.kernel.org/stable/c/a67a04ad05acb56640798625e73fa54d6d41cce1
https://git.kernel.org/stable/c/6b58d16037217d0c64a2a09b655f370403ec7219
https://git.kernel.org/stable/c/f152a6bfd187f67afeffc9fd68cbe46f51439be0
https://git.kernel.org/stable/c/69f95c5e9220f77ce7c540686b056c2b49e9a664
https://git.kernel.org/stable/c/b02ecc35d01a76b4235e008d2dd292895b28ecab
https://git.kernel.org/stable/c/e123015c0ba859cf48aa7f89c5016cc6e98e018d

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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.