#VU104523 Out-of-bounds read in Linux kernel - CVE-2022-49720

Vulnerability identifier: #VU104523

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-2022-49720

CWE-ID: CWE-125

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 an out-of-bounds read error within the blk_mq_alloc_request_hctx() function in block/blk-mq.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/14dc7a18abbe4176f5626c13c333670da8e06aa1
https://git.kernel.org/stable/c/7fa28a7c3d74933a4fc22d341b60927952f31c19
https://git.kernel.org/stable/c/b202a0bd2580ee5b0453772c46d464152fafff73
https://git.kernel.org/stable/c/b5e65ef044d627effdc2599040b6d204e003f955

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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.