How severe is CVE-2026-34962?

CVE-2026-34962 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-34962 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34962?

CVE-2026-34962 affects Pengutronix Barebox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34962?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34962 have an EU (EUVD) identifier?

Yes. CVE-2026-34962 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29325.

When was CVE-2026-34962 published?

CVE-2026-34962 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-34962

CVE-2026-34962 is a medium-severity vulnerability in Pengutronix Barebox with a CVSS 3.x base score of 6.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-835.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v4: 6.9
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29325
Weakness: CWE-835
Affected product: Pengutronix Barebox
Published: 2026-05-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-34962?: 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.
How severe is CVE-2026-34962?: CVE-2026-34962 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-34962 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34962?: CVE-2026-34962 affects Pengutronix Barebox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34962?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34962 have an EU (EUVD) identifier?: Yes. CVE-2026-34962 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29325.
When was CVE-2026-34962 published?: CVE-2026-34962 was published on 2026-05-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:*

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