#VU94419 Use-after-free in Linux kernel - CVE-2022-48796

Vulnerability identifier: #VU94419

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-48796

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the dev_iommu_get() function in drivers/iommu/iommu.c. A local user can escalate privileges on the system.

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/cb86e511e78e796de6947b8f3acca1b7c76fb2ff
https://git.kernel.org/stable/c/65ab30f6a6952fa9ee13009862736cf8d110e6e5
https://git.kernel.org/stable/c/f74fc4b5bd533ea3d30ce47cccb8ef8d21fda85a
https://git.kernel.org/stable/c/b54240ad494300ff0994c4539a531727874381f4

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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.