How severe is CVE-2026-34960?

CVE-2026-34960 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-34960 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34960?

CVE-2026-34960 affects Pengutronix Barebox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34960?

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

Does CVE-2026-34960 have an EU (EUVD) identifier?

Yes. CVE-2026-34960 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29290.

When was CVE-2026-34960 published?

CVE-2026-34960 was published on 2026-05-11 and last updated on 2026-06-17.

CVE-2026-34960

CVE-2026-34960 is a medium-severity vulnerability in Pengutronix Barebox with a CVSS 3.x base score of 6.5. 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 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29290
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 an out-of-bounds read vulnerability in DHCP option parsing within the dhcp_message_type() function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK packet without a proper 0xff end marker to cause the parser to read past valid packet data and potentially crash the system.

Frequently asked questions

What is CVE-2026-34960?: barebox prior to version 2026.04.0 contains an out-of-bounds read vulnerability in DHCP option parsing within the dhcp_message_type() function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK packet without a proper 0xff end marker to cause the parser to read past valid packet data and potentially crash the system.
How severe is CVE-2026-34960?: CVE-2026-34960 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-34960 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34960?: CVE-2026-34960 affects Pengutronix Barebox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34960?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34960 have an EU (EUVD) identifier?: Yes. CVE-2026-34960 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29290.
When was CVE-2026-34960 published?: CVE-2026-34960 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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