#VU108278 NULL pointer dereference in Linux kernel - CVE-2022-49781

Vulnerability identifier: #VU108278

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-2022-49781

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 amd_pmu_handle_irq() function in arch/x86/events/amd/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: 6.0, 6.0 rc1, 6.0 rc2, 6.0 rc3, 6.0 rc4, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.0.8, 6.0.9

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External links
https://git.kernel.org/stable/c/baa014b9543c8e5e94f5d15b66abfe60750b8284
https://git.kernel.org/stable/c/fd5e454b856ed86b090336e269695d9908609b71
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.10

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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.