CVE-2023-53998 Affecting kernel-tools-libs package, versions *


Severity

Recommended
low

Based on CentOS security rating.

Threat Intelligence

EPSS
0.03% (9th percentile)

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  • Snyk IDSNYK-CENTOS8-KERNELTOOLSLIBS-14719447
  • published26 Dec 2025
  • disclosed24 Dec 2025

Introduced: 24 Dec 2025

NewCVE-2023-53998  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 kernel-tools-libs.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-libs package and not the kernel-tools-libs package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

hwrng: virtio - Fix race on data_avail and actual data

The virtio rng device kicks off a new entropy request whenever the data available reaches zero. When a new request occurs at the end of a read operation, that is, when the result of that request is only needed by the next reader, then there is a race between the writing of the new data and the next reader.

This is because there is no synchronisation whatsoever between the writer and the reader.

Fix this by writing data_avail with smp_store_release and reading it with smp_load_acquire when we first enter read. The subsequent reads are safe because they're either protected by the first load acquire, or by the completion mechanism.

Also remove the redundant zeroing of data_idx in random_recv_done (data_idx must already be zero at this point) and data_avail in request_entropy (ditto).

CVSS Base Scores

version 3.1