Out-of-bounds Read Affecting shim package, versions <15.8-1~deb12u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.4% (33rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-SHIM-18751801
  • published13 Aug 2026
  • disclosed29 Jan 2024

Introduced: 29 Jan 2024

CVE-2023-40550  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Echo:latest shim to version 15.8-1~deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim package and not the shim package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.

CVSS Base Scores

version 3.1