#VU90537 NULL pointer dereference in Linux kernel - CVE-2023-52783

Vulnerability identifier: #VU90537

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-2023-52783

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 txgbe_sw_init() function in drivers/net/ethernet/wangxun/txgbe/txgbe_main.c, within the ngbe_sw_init() function in drivers/net/ethernet/wangxun/ngbe/ngbe_main.c, within the wx_sw_init() function in drivers/net/ethernet/wangxun/libwx/wx_hw.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.6, 6.6 rc1, 6.6 rc2, 6.6 rc3, 6.6 rc4, 6.6 rc5, 6.6 rc6, 6.6.1, 6.6.2, 6.6.3, 6.7 rc1, 6.7 rc2, 6.7 rc3, 6.7 rc5, 6.7 rc6, 6.7 rc7

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External links
https://git.kernel.org/stable/c/61a55071653974dab172d4c5d699bb365cfd13c9
https://git.kernel.org/stable/c/8ba2c459668cfe2aaacc5ebcd35b4b9ef8643013
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7

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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.