#VU96424 NULL pointer dereference in Linux kernel - CVE-2022-48921

Vulnerability identifier: #VU96424

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-2022-48921

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 tg_nop(), sched_fork(), set_user_nice(), __setscheduler_params() and sched_init() functions in kernel/sched/core.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/8f317cd888059c59e2fa924bf4b0957cfa53f78e
https://git.kernel.org/stable/c/e0bcd6b5779352aed88f2e538a82a39f1a7715bb
https://git.kernel.org/stable/c/589a954daab5e18399860b6c8ffaeaf79844eb20
https://git.kernel.org/stable/c/13765de8148f71fa795e0a6607de37c49ea5915a

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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.