#VU104569 NULL pointer dereference in Linux kernel - CVE-2022-49424

Vulnerability identifier: #VU104569

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-2022-49424

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 MT2701_IOMMU_PAGE_SIZE() and mtk_iommu_probe_device() functions in drivers/iommu/mtk_iommu_v1.c, within the mtk_iommu_probe_device() function in drivers/iommu/mtk_iommu.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/8837c2682b9b2eed83e6212bcf79850c593a6fee
https://git.kernel.org/stable/c/c3c2734e28d7fac50228c4d2b8896e8695adf304
https://git.kernel.org/stable/c/de78657e16f41417da9332f09c2d67d100096939
https://git.kernel.org/stable/c/e9c63c0f73a1bbfd02624f5eae7e881df8b6830f

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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.