Improper locking in Linux kernel - CVE-2021-47574

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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 v4.0: 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-2021-47574
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel

Detailed vulnerability description

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.


How to mitigate CVE-2021-47574

Install update from vendor's website.

Sources