SB20250619239 - NULL pointer dereference in Linux kernel tty driver
Published: June 19, 2025 Updated: June 21, 2025
Security Bulletin ID
SB20250619239
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) NULL pointer dereference (CVE-ID: CVE-2022-49940)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the gsmld_receive_buf() function in drivers/tty/n_gsm.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/309aea4b6b813f6678c3a547cfd7fe3a76ffa976
- https://git.kernel.org/stable/c/5a82cf64f8ad63caf6bf115642ce44ddbc64311e
- https://git.kernel.org/stable/c/5aa37f9510345a812c0998bcbbc4d88d1dcc4d8b
- https://git.kernel.org/stable/c/f16c6d2e58a4c2b972efcf9eb12390ee0ba3befb
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.205
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.66
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0