Vulnerability identifier: #VU92922

Vulnerability risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48734

CWE-ID: CWE-667

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 locking within the btrfs_quota_disable() and qgroup_rescan_init() functions in fs/btrfs/qgroup.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/26b3901d20bf9da2c6a00cb1fb48932166f80a45
http://git.kernel.org/stable/c/32747e01436aac8ef93fe85b5b523b4f3b52f040
http://git.kernel.org/stable/c/89d4cca583fc9594ee7d1a0bc986886d6fb587e6
http://git.kernel.org/stable/c/31198e58c09e21d4f65c49d2361f76b87aca4c3f
http://git.kernel.org/stable/c/e804861bd4e69cc5fe1053eedcb024982dde8e48

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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.