#VU90798 Improper locking in Linux kernel - CVE-2023-52615

Vulnerability identifier: #VU90798

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-2023-52615

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 rng_get_data() and rng_dev_read() functions in drivers/char/hw_random/core.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/eafd83b92f6c044007a3591cbd476bcf90455990
https://git.kernel.org/stable/c/5030d4c798863ccb266563201b341a099e8cdd48
https://git.kernel.org/stable/c/c6a8111aacbfe7a8a70f46cc0de8eed00561693c
https://git.kernel.org/stable/c/26cc6d7006f922df6cc4389248032d955750b2a0
https://git.kernel.org/stable/c/aa8aa16ed9adf1df05bb339d588cf485a011839e
https://git.kernel.org/stable/c/ecabe8cd456d3bf81e92c53b074732f3140f170d
https://git.kernel.org/stable/c/6822a14271786150e178869f1495cc03e74c5029
https://git.kernel.org/stable/c/78aafb3884f6bc6636efcc1760c891c8500b9922

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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.