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Vulnerability record · CVE-2021-37847 · published 2 August 2021

CVE-2021-37847: Pengutronix barebox vulnerability

Pengutronix · Barebox

crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.

7.5 CVSS 3.1 High EPSS 1.5% · top 26.1%
7.5CVSS 3.1 base score, v2 5.0
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gist.github.com/gquere/816dfadbad98745090034100a8a651eb ExploitThird Party Advisory
https://github.com/saschahauer/barebox/commit/0a9f9a7410681e55362f8311537ebc7be9ad0fbe PatchThird Party Advisory
https://gist.github.com/gquere/816dfadbad98745090034100a8a651eb ExploitThird Party Advisory
https://github.com/saschahauer/barebox/commit/0a9f9a7410681e55362f8311537ebc7be9ad0fbe PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-37847), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.