SB20240531346 - Memory leak in Linux kernel tty serial driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531346
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Memory leak (CVE-ID: CVE-2021-47527)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the uart_tty_port_shutdown() function in drivers/tty/serial/serial_core.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/011f6c92b5bf6e1fbfdedc8b5232f64c1c493206
- https://git.kernel.org/stable/c/e74d9663fd57640fc3394abb5c76fa95b9cc2f2e
- https://git.kernel.org/stable/c/1179b168fa3f3a6aae3bd140000455a0e58457db
- https://git.kernel.org/stable/c/c5da8aa441053958594f94254592bb41264bdfbf
- https://git.kernel.org/stable/c/e1722acf4f0d4d67b60f57e08ce16f8b66cd4b8f
- https://git.kernel.org/stable/c/64e491c1634b73d3bddc081d08620bdc92ab2c12
- https://git.kernel.org/stable/c/00de977f9e0aa9760d9a79d1e41ff780f74e3424
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.257
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.220
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.292
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.84
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.164