#VU86243 NULL pointer dereference in Linux kernel - CVE-2023-46343
Vulnerability identifier: #VU86243
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-2023-46343
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 a NULL pointer dereference error within the send_acknowledge() function in net/nfc/nci/spi.c. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Linux kernel: before 6.5.9, 6.5.9
External links
https://lore.kernel.org/netdev/20231013184129.18738-1-krzysztof.kozlowski%40linaro.org/T/#r38bdbaf8ae15305b77f6c5bc8e15d38f405623c7
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9
https://github.com/torvalds/linux/commit/7937609cd387246aed994e81aa4fa951358fba41
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7937609cd387246aed994e81aa4fa951358fba41
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.
