#VU90796 Improper locking in Linux kernel - CVE-2023-52638

Vulnerability identifier: #VU90796

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-2023-52638

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 j1939_jsk_add(), j1939_sk_recv_match(), j1939_sk_recv(), j1939_sk_errqueue() and j1939_sk_netdev_event_netdown() functions in net/can/j1939/socket.c, within the j1939_netdev_start() function in net/can/j1939/main.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.15 - 5.15.148, 6.1 - 6.1.78, 6.6 - 6.6.17, 6.7 - 6.7.5, 6.8 rc1 - 6.8 rc5

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External links
https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170
https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf
https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e
https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284
https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.149
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.79
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.18
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7.6
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?