Use After Free Affecting linux-4.19 package, versions <4.19.160-2~deb9u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.44% (37th percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1048660
  • published17 Oct 2020
  • disclosed2 Dec 2020

Introduced: 17 Oct 2020

CVE-2020-25656  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:9 linux-4.19 to version 4.19.160-2~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 flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

CVSS Base Scores

version 3.1