Improper locking in Linux kernel io_uring



| Updated: 2025-05-12
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-52903
CWE-ID CWE-667
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper locking

EUVDB-ID: #VU96361

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-2023-52903

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: 5.10 - 6.2 rc7

CPE2.3 External links

https://git.kernel.org/stable/c/de77faee280163ff03b7ab64af6c9d779a43d4c4
https://git.kernel.org/stable/c/ed4629d1e968359fbb91d0a3780b1e86a2c08845
https://git.kernel.org/stable/c/7fc3990dad04a677606337ebc61964094d6cb41b
https://git.kernel.org/stable/c/544d163d659d45a206d8929370d5a2984e546cb7
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.165
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.89
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.7
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2


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.



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