#VU102098 NULL pointer dereference in Linux kernel - CVE-2024-56696

Vulnerability identifier: #VU102098

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-2024-56696

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 test_format_fill_silence(), test_playback_avail(), test_capture_avail() and test_pcm_format_name() functions in sound/core/sound_kunit.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.11, 6.11.1, 6.11.2, 6.11.3, 6.11.4, 6.11.5, 6.11.6, 6.11.7, 6.11.8, 6.11.9, 6.11.10

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External links
https://git.kernel.org/stable/c/8bfff486ecc79a72e9380e2d5e0ff234d5542d2f
https://git.kernel.org/stable/c/9ad467a2b2716d4ed12f003b041aa6c776a13ff5
https://git.kernel.org/stable/c/f5486bf8abfe778b368d8fd1aa655dc01d0013ca
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11.11

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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.