Improper locking in Linux kernel io_uring

1) Improper locking

EUVDB-ID: #VU96361

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2023-52903

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the io_iopoll_complete() function in io_uring/io_uring.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

External links

http://git.kernel.org/stable/c/de77faee280163ff03b7ab64af6c9d779a43d4c4
http://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845
http://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41b
http://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7

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.