Loop with Unreachable Exit Condition ('Infinite Loop') Affecting linux-4.19 package, versions <4.19.146-1~deb9u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1013393
  • published25 Sept 2020
  • disclosed6 Oct 2020

Introduced: 25 Sep 2020

CVE-2020-25641  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Debian:9 linux-4.19 to version 4.19.146-1~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 flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7. A zero-length biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service. This flaw allows a local attacker with basic privileges to issue requests to a block device, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS Base Scores

version 3.1