#VU96435 Improper locking in Linux kernel - CVE-2022-48902

Vulnerability identifier: #VU96435

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-2022-48902

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 assert_eb_page_uptodate() function in fs/btrfs/extent_io.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/e00077aa439f0e8f416699fa4e9600db6583db70
https://git.kernel.org/stable/c/9efcc83b33b576302147634eca9bece8e3737e34
https://git.kernel.org/stable/c/a50e1fcbc9b85fd4e95b89a75c0884cb032a3e06

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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.