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CVE-2021-37848

24
FAUCET Score

CVE-2021-37848 is a timing side-channel vulnerability in Pengutronix barebox through version 2021.07.0, specifically within the common/password.c component. This flaw allows an unauthenticated attacker to remotely infer password hash information due to the use of strncmp during hash comparison, which leaks timing data. Rated with a CVSS score of 7.5 (High), it poses a significant risk of information disclosure. There is currently no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2021.07.0CPE matchmatch criteria
cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.54%
Probability of exploitation in next 30 days
EPSS Percentile
72.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0154 is in the 54th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

gist.github.com / gquere/816dfadbad98745090034100a8a651eb
ExploitThird Party Advisory
github.com / saschahauer/barebox/commit/a3337563c705bc8e0cf32f910b3e9e3c43d962ff
PatchThird Party Advisory