Information Exposure 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% (20th percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1730478
  • published2 Aug 2021
  • disclosed2 Aug 2021

Introduced: 2 Aug 2021

CVE-2021-34556  (opens in a new tab)
CWE-203  (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.

In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack.

CVSS Base Scores

version 3.1