#VU104933 Input validation error in Linux kernel - CVE-2022-49056

Vulnerability identifier: #VU104933

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-2022-49056

CWE-ID: CWE-20

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 improper input validation within the io_issue_sqe() function in fs/io_uring.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.17, 5.17 rc1, 5.17 rc2, 5.17 rc3, 5.17 rc4, 5.17 rc5, 5.17 rc6, 5.17 rc7, 5.17 rc8, 5.17 rc9, 5.17 rc12, 5.17.1, 5.17.2, 5.17.3, 5.18 rc1, 5.18 rc2, 5.18 rc3, 5.18 rc5, 5.18 rc6, 5.18 rc7, 5.18 rc8

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External links
https://git.kernel.org/stable/c/262960775e0d2cdf97a3e33993e95e13175df4bb
https://git.kernel.org/stable/c/701521403cfb228536b3947035c8a6eca40d8e58
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18

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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.