Out-of-bounds Read Affecting linux-4.19 package, versions <4.19.208-1~deb9u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1730482
  • published2 Sept 2021
  • disclosed16 Feb 2022

Introduced: 2 Sep 2021

CVE-2021-3753  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Debian:9 linux-4.19 to version 4.19.208-1~deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-4.19 package and not the linux-4.19 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1