How severe is CVE-2026-34961?

CVE-2026-34961 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-2026-34961 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34961?

CVE-2026-34961 affects Pengutronix Barebox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34961?

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

Does CVE-2026-34961 have an EU (EUVD) identifier?

Yes. CVE-2026-34961 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29323.

When was CVE-2026-34961 published?

CVE-2026-34961 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-34961

CVE-2026-34961 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v4: 6.9
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29323
Weakness: CWE-125
Affected product: Pengutronix Barebox
Published: 2026-05-11
Last modified: 2026-06-17

Description

barebox prior to version 2026.04.0 contains out-of-bounds read vulnerabilities in ext4 extent parsing due to missing validation of the eh_entries field against buffer capacity in fs/ext4/ext4_common.c. Attackers can supply a malicious ext4 filesystem image via USB, SD card, or network boot to trigger heap out-of-bounds reads during boot-time filesystem parsing, potentially redirecting reads to arbitrary disk offsets.

Frequently asked questions

What is CVE-2026-34961?: barebox prior to version 2026.04.0 contains out-of-bounds read vulnerabilities in ext4 extent parsing due to missing validation of the eh_entries field against buffer capacity in fs/ext4/ext4_common.c. Attackers can supply a malicious ext4 filesystem image via USB, SD card, or network boot to trigger heap out-of-bounds reads during boot-time filesystem parsing, potentially redirecting reads to arbitrary disk offsets.
How severe is CVE-2026-34961?: CVE-2026-34961 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-2026-34961 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34961?: CVE-2026-34961 affects Pengutronix Barebox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34961?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34961 have an EU (EUVD) identifier?: Yes. CVE-2026-34961 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29323.
When was CVE-2026-34961 published?: CVE-2026-34961 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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