SB20250619213 - Out-of-bounds read in Linux kernel tty vt driver
Published: June 19, 2025 Updated: June 21, 2025
Security Bulletin ID
SB20250619213
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) Out-of-bounds read (CVE-ID: CVE-2022-49948)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the con_font_set() and con_font_default() functions 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/1cf1930369c9dc428d827b60260c53271bff3285
- https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db
- https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f
- https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb
- https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a
- https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc
- https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e
- https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.258