SB20250620212 - Buffer overflow in Linux kernel tty vt driver
Published: June 20, 2025 Updated: June 21, 2025
Security Bulletin ID
SB20250620212
CSH 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 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2022-50222)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 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
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the vc_uniscr_alloc() function in drivers/tty/vt/vt.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/446f123aa6021e5f75a20789f05ff3f7ae51a42f
- https://git.kernel.org/stable/c/5c6c65681f39bf71bc72ed589dec3b8b20e75cac
- https://git.kernel.org/stable/c/777a462e1ae50a01fc4a871efa8e34d596a1e17d
- https://git.kernel.org/stable/c/af77c56aa35325daa2bc2bed5c2ebf169be61b86
- https://git.kernel.org/stable/c/cc9e874dace0c89ae535230c7da19b764746811e
- https://git.kernel.org/stable/c/e02fa87e572bb7d90dcdbce9c0f519f1eb992e96
- https://git.kernel.org/stable/c/e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2