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CVE-2021-3753

Public on 2021-09-08
Modified on 2021-10-04
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.

Severity
Medium
See what this means
CVSS v3 Base Score
4.7
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2021-09-30 19:25 ALAS-2021-1539
Amazon Linux 2 - Core kernel 2021-09-08 23:35 ALAS2-2021-1704
Amazon Linux 2 - Kernel-5.10 Extra kernel 2022-01-20 23:50 ALAS2KERNEL-5.10-2022-005
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-01-20 19:05 ALAS2KERNEL-5.4-2022-007
Amazon Linux 2 - Microvm-kernel-4.14 Extra microvm-kernel 2023-09-14 04:27 ALAS2MICROVM-KERNEL-4.14-2023-003
Amazon Linux 2 - Microvm-kernel-4.14 Extra microvm-kernel 2023-09-14 04:27 ALAS2MICROVM-KERNEL-4.14-2023-002

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD CVSSv3 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD CVSSv2 1.9 AV:L/AC:M/Au:N/C:P/I:N/A:N