Loop with Unreachable Exit Condition ('Infinite Loop') Affecting bpftool package, versions <0:4.18.0-193.40.1.el8_2


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-RHEL8-BPFTOOL-3883771
  • published26 Jul 2021
  • disclosed30 Sept 2020

Introduced: 30 Sep 2020

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

How to fix?

Upgrade RHEL:8 bpftool to version 0:4.18.0-193.40.1.el8_2 or higher.
This issue was patched in RHSA-2021:0073.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by RHEL. See How to fix? for RHEL:8 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 Scores

version 3.1