Memory leak in Linux kernel - CVE-2021-47330
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU89960
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-2021-47330
CWE-ID: CWE-401
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 memory leak within the serial_resume() and serial_probe() functions in drivers/tty/serial/8250/serial_cs.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/b5a2799cd62ed30c81b22c23028d9ee374e2138c
- https://git.kernel.org/stable/c/331f5923fce4f45b8170ccf06c529e8eb28f37bc
- https://git.kernel.org/stable/c/34f4590f5ec9859ea9136249f528173d150bd584
- https://git.kernel.org/stable/c/cddee5c287e26f6b2ba5c0ffdfc3a846f2f10461
- https://git.kernel.org/stable/c/ee16bed959862a6de2913f71a04cb563d7237b67
- https://git.kernel.org/stable/c/7a80f71601af015856a0aeb1e3c294037ac3dd32
- https://git.kernel.org/stable/c/c39cf4df19acf0133fa284a8cd83fad42cd13cc2
- https://git.kernel.org/stable/c/b2ef1f5de40342de44fc5355321595f91774dab5
- https://git.kernel.org/stable/c/fad92b11047a748c996ebd6cfb164a63814eeb2e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.276
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134