Main Vulnerability Database Vulnerabilities #VU92358

Improper locking in Linux kernel - CVE-2021-47574

Published: June 20, 2024 / Updated: May 13, 2025

Vulnerability identifier: #VU92358

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2021-47574

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to improper locking within the xennet_open(), xennet_tx_buf_gc(), xennet_close(), xennet_get_extras(), xennet_fill_frags(), __skb_queue_tail(), xennet_set_features(), setup_netfront_single(), setup_netfront_split() and xennet_init_queue() functions in drivers/net/xen-netfront.c. A local user can perform a denial of service (DoS) attack.

Affected software

Linux kernel

How to mitigate CVE-2021-47574

Install update from vendor's website.

Linux kernel - addressed in versions 4.4.296, 4.9.294, 4.14.259, 4.19.222, 5.4.168, 5.10.88, 5.15.11, 5.16

External References

Related Security Bulletins