Double Free in Linux kernel - CVE-2021-47564
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90887
CSH Severity: Low
CVSSv4.0: 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-2021-47564
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a double free error within the prestera_port_bridge_join() function in drivers/net/ethernet/marvell/prestera/prestera_switchdev.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/5dca8eff4627315df98feec09fff9dfe3356325e
- https://git.kernel.org/stable/c/03e5203d2161a00afe4d97d206d2293e40b2f253
- https://git.kernel.org/stable/c/e8d032507cb7912baf1d3e0af54516f823befefd
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.83
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16