#VU91658 Memory leak in Linux kernel - CVE-2021-47054

Cybersecurity Help s.r.o.

Published: 2024-06-10 | Updated: 2025-05-13

Vulnerability identifier: #VU91658

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-2021-47054

CWE-ID: CWE-401

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 memory leak within the qcom_ebi2_probe() function in drivers/bus/qcom-ebi2.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.9, 4.9.0, 4.9.1, 4.9.2, 4.9.3, 4.9.4, 4.9.5, 4.9.6, 4.9.7, 4.9.8, 4.9.9, 4.9.10, 4.9.11, 4.9.12, 4.9.13, 4.9.14, 4.9.15, 4.9.16, 4.9.17, 4.9.18, 4.9.19, 4.9.20, 4.9.21, 4.9.22, 4.9.23, 4.9.24, 4.9.25, 4.9.26, 4.9.27, 4.9.28, 4.9.29, 4.9.30, 4.9.31, 4.9.32, 4.9.33, 4.9.34, 4.9.35, 4.9.36, 4.9.37, 4.9.38, 4.9.39, 4.9.40, 4.9.41, 4.9.42, 4.9.43, 4.9.44, 4.9.45, 4.9.46, 4.9.47, 4.9.48, 4.9.49, 4.9.50, 4.9.51, 4.9.52, 4.9.53, 4.9.54, 4.9.55, 4.9.56, 4.9.57, 4.9.58, 4.9.59, 4.9.60, 4.9.61, 4.9.62, 4.9.63, 4.9.64, 4.9.65, 4.9.66, 4.9.67, 4.9.68, 4.9.69, 4.9.70, 4.9.71, 4.9.72, 4.9.73, 4.9.74, 4.9.75, 4.9.76, 4.9.77, 4.9.78, 4.9.79, 4.9.80, 4.9.81, 4.9.82, 4.9.83, 4.9.84, 4.9.85, 4.9.86, 4.9.87, 4.9.88, 4.9.89, 4.9.90, 4.9.91, 4.9.92, 4.9.93, 4.9.94, 4.9.95, 4.9.96, 4.9.97, 4.9.98, 4.9.99, 4.9.100, 4.9.101, 4.9.102, 4.9.103, 4.9.104, 4.9.105, 4.9.106, 4.9.107, 4.9.108, 4.9.109, 4.9.110, 4.9.111, 4.9.112, 4.9.113, 4.9.114, 4.9.115, 4.9.116, 4.9.117, 4.9.118, 4.9.119, 4.9.120, 4.9.121, 4.9.122, 4.9.123, 4.9.124, 4.9.125, 4.9.126, 4.9.127, 4.9.128, 4.9.129, 4.9.130, 4.9.131, 4.9.132, 4.9.133, 4.9.134, 4.9.135, 4.9.136, 4.9.137, 4.9.138, 4.9.139, 4.9.140, 4.9.141, 4.9.142, 4.9.143, 4.9.144, 4.9.145, 4.9.146, 4.9.147, 4.9.148, 4.9.149, 4.9.150, 4.9.151, 4.9.152, 4.9.153, 4.9.154, 4.9.155, 4.9.156, 4.9.157, 4.9.158, 4.9.159, 4.9.160, 4.9.161, 4.9.162, 4.9.163, 4.9.164, 4.9.165, 4.9.166, 4.9.167, 4.9.168, 4.9.169, 4.9.170, 4.9.171, 4.9.172, 4.9.173, 4.9.174, 4.9.175, 4.9.176, 4.9.177, 4.9.178, 4.9.179, 4.9.180, 4.9.181, 4.9.182, 4.9.183, 4.9.184, 4.9.185, 4.9.186, 4.9.187, 4.9.188, 4.9.189, 4.9.190, 4.9.191, 4.9.192, 4.9.193, 4.9.194, 4.9.195, 4.9.196, 4.9.197, 4.9.198, 4.9.199, 4.9.200, 4.9.201, 4.9.202, 4.9.203, 4.9.204, 4.9.205, 4.9.206, 4.9.207, 4.9.208, 4.9.209, 4.9.210, 4.9.210-1, 4.9.211, 4.9.212, 4.9.213, 4.9.214, 4.9.215, 4.9.216, 4.9.217, 4.9.218, 4.9.219, 4.9.220, 4.9.221, 4.9.222, 4.9.223, 4.9.224, 4.9.225, 4.9.226, 4.9.227, 4.9.228, 4.9.229, 4.9.230, 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rc6, 5.12 rc8, 5.12.1, 5.12.2, 5.12.3, 5.13 rc1, 5.13 rc4, 5.13 rc5

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.

Latest bulletins with this vulnerability

Multiple vulnerabilities in Dell Data Protection Central

Multiple vulnerabilities in Dell Storage Resource Manager (SRM) and Dell Storage Monitoring and Reporting (SMR)

openEuler 20.03 LTS SP4 update for kernel

openEuler 20.03 LTS SP1 update for kernel

Multiple vulnerabilities in Dell Cloud Tiering Appliance

Multiple vulnerabilities in Dell Secure Connect Gateway

Memory leak in Linux kernel bus driver