#VU104506 Out-of-bounds read in Linux kernel - CVE-2022-49407

Vulnerability identifier: #VU104506

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-2022-49407

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 dlm_posix_lock(), dlm_plock_callback() and dev_write() functions in fs/dlm/plock.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/2c55155cc365861044d9e6e80e342693e8805e33
https://git.kernel.org/stable/c/42252d0d2aa9b94d168241710a761588b3959019
https://git.kernel.org/stable/c/49cd9eb7b9a7b88124b31e31f8e539acaf1b3a6d
https://git.kernel.org/stable/c/56aa8d1fbd02357f3bf81bdfba1cde87ce8402fc
https://git.kernel.org/stable/c/5a1765adf9855cf0f6d3f7e0eb4b78ca66f70dee
https://git.kernel.org/stable/c/72f2f68970f9bdc252d59e119b385a6441b0b155
https://git.kernel.org/stable/c/899bc4429174861122f0c236588700a4710c1fec
https://git.kernel.org/stable/c/acdad5bc9827922ec2f2e84fd198718aa8e8ab92
https://git.kernel.org/stable/c/e421872fa17542cf33747071fb141b0130ce9ef7

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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.