#VU92028 Improper locking in Linux kernel - CVE-2022-48673

Vulnerability identifier: #VU92028

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-2022-48673

CWE-ID: CWE-667

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 improper locking within the smc_wr_rx_process_cqes(), smc_wr_free_link() and smc_wr_create_link() functions in net/smc/smc_wr.c, within the smcr_link_init() function in net/smc/smc_core.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

---

External links
https://git.kernel.org/stable/c/89fcb70f1acd6b0bbf2f7bfbf45d7aa75a9bdcde
https://git.kernel.org/stable/c/e9b1a4f867ae9c1dbd1d71cd09cbdb3239fb4968

---

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.