#VU93425 Buffer overflow in Linux kernel - CVE-2023-52775

Vulnerability identifier: #VU93425

Vulnerability risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-52775

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the smcr_clnt_conf_first_link() function in net/smc/af_smc.c when handling SMC DECLINE messages. A remote attacker can send specially crafted SMC DECLINE message to the system, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/5ada292b5c504720a0acef8cae9acc62a694d19c
https://git.kernel.org/stable/c/90072af9efe8c7bd7d086709014ddd44cebd5e7c
https://git.kernel.org/stable/c/94a0ae698b4d5d5bb598e23228002a1491c50add
https://git.kernel.org/stable/c/7234d2b5dffa5af77fd4e0deaebab509e130c6b1
https://git.kernel.org/stable/c/e6d71b437abc2f249e3b6a1ae1a7228e09c6e563

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.