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CVE-2021-3753

Updated on 16 Feb 2022

Severity

4.7 Medium severity

Details

CVSS score
4.7
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

Details

Affected product:
AlmaLinux 9.2 ESU , CentOS 6 ALT , CentOS 6 ELS , CentOS 7 ALT , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 6 ELS , Debian 10 , Debian 10 cloud , Debian 9 , Endurance 6 elrepo , Endurance 7 eig 4.14 , Oracle Linux 6 ELS , Proofpoint , Proxmox VE 5 , Proxmox VE 6 , Ubuntu 14.04 , Ubuntu 14.04 ESM , Ubuntu 16.04 , Ubuntu 16.04 ELS , Ubuntu 16.04 ESM , Ubuntu 18.04 , Ubuntu 18.04 ELS , Ubuntu 20.04 , Upstream 4.14 , Upstream 4.19 , Upstream 4.4 , Upstream 4.9
Affected packages:
kernel @ 5.14.0 (+58 more)
A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

Fixes