Improper Initialization in Linux kernel - CVE-2021-47010
Published: June 27, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93432
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-2021-47010
CWE-ID: CWE-665
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 initialization within the tcp_set_default_congestion_control() function in net/ipv4/tcp_cong.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47010
Install updates from vendor's website.
Linux kernel - addressed in versions 4.19.191, 5.4.119, 5.10.37, 5.11.21, 5.12.4, 5.13
External References
- https://git.kernel.org/stable/c/992de06308d9a9584d59b96d294ac676f924e437
- https://git.kernel.org/stable/c/9884f745108f7d25b189bbcd6754e284fb29ab68
- https://git.kernel.org/stable/c/6c1ea8bee75df8fe2184a50fcd0f70bf82986f42
- https://git.kernel.org/stable/c/efe1532a6e1a8e3c343d04fff510f0ed80328f9c
- https://git.kernel.org/stable/c/e7d7bedd507bb732e600403b7a96f9fe48d0ca31
- https://git.kernel.org/stable/c/8d432592f30fcc34ef5a10aac4887b4897884493
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.191
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.119