Buffer overflow in Linux kernel - CVE-2021-47152
Published: June 24, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93160
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-2021-47152
CWE-ID: CWE-119
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 memory corruption within the mptcp_skb_can_collapse_to() function in net/mptcp/protocol.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47152
Install update from vendor's website.
Linux kernel - addressed in versions 5.10.42, 5.12.9, 5.13
External References
- https://git.kernel.org/stable/c/3267a061096efc91eda52c2a0c61ba76e46e4b34
- https://git.kernel.org/stable/c/18e7f0580da15cac1e79d73683ada5a9e70980f8
- https://git.kernel.org/stable/c/29249eac5225429b898f278230a6ca2baa1ae154
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13