Is CVE-2026-34962 in the CISA KEV catalog?

No. CVE-2026-34962 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-34962?

CVE-2026-34962 has a CVSS v3 base score of 6.2 (MEDIUM).

What is the EPSS score for CVE-2026-34962?

CVE-2026-34962 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-34962?

Upgrade barebox to 2026.04.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-34962

MEDIUM

6.2

CVSS v3

NVD

Description

barebox version prior to 2026.04.0 contains a denial-of-service vulnerability in ext4 directory parsing in fs/ext4/ext4_common.c where the ext4fs_iterate_dir() function fails to validate that directory entry length values are non-zero. Attackers can supply a malicious ext4 filesystem image with a crafted directory entry containing a direntlen value of 0 to cause an infinite loop during directory listing or path resolution, resulting in the boot process hanging indefinitely.

CWE-835

How to fix

Remediation Available

bareboxNVD

Affected:< 2026.04.0Fixed in:2026.04.0CVE-2026-34962derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Third-Party Advisory1

vulncheck.com

Release Notes1

github.com

Product1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.