Memory leak in Linux kernel - CVE-2021-47298
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU89956
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-2021-47298
CWE-ID: CWE-401
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 leak within the sk_psock_skb_ingress() and sk_psock_skb_ingress_self() functions in net/core/skmsg.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47298
Install update from vendor's website.
Linux kernel - addressed in versions 5.10.54, 5.13.6, 5.14
External References
- https://git.kernel.org/stable/c/715f378f42909c401ec043f5150c4fdf57fb8889
- https://git.kernel.org/stable/c/6c508a1c6c62793dc6e6872cad4b200097bab7c9
- https://git.kernel.org/stable/c/7e6b27a69167f97c56b5437871d29e9722c3e470
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.54
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14