#VU94422 Use-after-free in Linux kernel - CVE-2022-48790

Vulnerability identifier: #VU94422

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-2022-48790

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 nvme_async_event_work() function in drivers/nvme/host/core.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/a25e460fbb0340488d119fb2e28fe3f829b7417e
https://git.kernel.org/stable/c/70356b756a58704e5c8818cb09da5854af87e765
https://git.kernel.org/stable/c/0ead57ceb21bbf15963b4874c2ac67143455382f
https://git.kernel.org/stable/c/e043fb5a0336ee74614e26f0d9f36f1f5bb6d606
https://git.kernel.org/stable/c/9e956a2596ae276124ef0d96829c013dd0faf861
https://git.kernel.org/stable/c/0fa0f99fc84e41057cbdd2efbfe91c6b2f47dd9d

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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.