Input validation error in Linux kernel unicode

1) Input validation error

EUVDB-ID: #VU99849

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-2024-50089

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the nfdicf_init() and main() functions in fs/unicode/mkutf8data.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4 - 6.12.4

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.0:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.7:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/39fffca572844d733b137a0ff9eacd67b9b0c8e3
https://git.kernel.org/stable/c/651b954cd8d5b0a358ceb47c93876bb6201224e4
https://git.kernel.org/stable/c/21526498d25e54bda3c650f756493d63fd9131b7
https://git.kernel.org/stable/c/ac20736861f3c9c8e0a78273a4c57e9bcb0d8cc6
https://git.kernel.org/stable/c/876d3577a5b353e482d9228d45fa0d82bf1af53a
https://git.kernel.org/stable/c/5c26d2f1d3f5e4be3e196526bead29ecb139cf91
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.227
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.231
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.168
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.174
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.285
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.287
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.113
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.120
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.5
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.57
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.66

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.