Use-after-free in Linux kernel block driver



| Updated: 2025-05-10
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-53111
CWE-ID CWE-416
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) Use-after-free

EUVDB-ID: #VU108428

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-53111

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the loop_queue_rq() function in drivers/block/loop.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.1.20

CPE2.3 External links

https://git.kernel.org/stable/c/407badf73ec9fb0d5744bf2ca1745c1818aa222f
https://git.kernel.org/stable/c/6917395c4667cfb607ed8bf1826205a59414657c
https://git.kernel.org/stable/c/9b0cb770f5d7b1ff40bea7ca385438ee94570eec
https://git.kernel.org/stable/c/e3fda704903f6d1fc351412f1bc6620333959ada
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.21


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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