CVE-2021-3753

medium

Description

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1999589

https://www.openwall.com/lists/oss-security/2021/09/01/4

https://github.com/torvalds/linux/commit/2287a51ba822384834dafc1c798453375d1107c7

Details

Source: MITRE

Published: 2022-02-16

Updated: 2022-02-28

Type: CWE-362

Risk Information

CVSS v2

Base Score: 1.9

Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3

Base Score: 4.7

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 1

Severity: MEDIUM