How severe is CVE-2024-42040?

CVE-2024-42040 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2024-42040 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-42040?

CVE-2024-42040 affects Denx U-boot. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-42040?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-42040 have an EU (EUVD) identifier?

Yes. CVE-2024-42040 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-39870.

When was CVE-2024-42040 published?

CVE-2024-42040 was published on 2024-08-23 and last updated on 2026-06-17.

CVE-2024-42040

CVE-2024-42040 is a high-severity vulnerability in Denx U-boot with a CVSS 3.x base score of 8.1. 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-120.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-39870
Weakness: CWE-120
Affected product: Denx U-boot
Published: 2024-08-23
Last modified: 2026-06-17

Description

Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an attacker on the local network to leak memory from four up to 32 bytes of memory stored behind the packet to the network depending on the later use of DHCP-provided parameters via crafted DHCP responses.

Frequently asked questions

What is CVE-2024-42040?: Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an attacker on the local network to leak memory from four up to 32 bytes of memory stored behind the packet to the network depending on the later use of DHCP-provided parameters via crafted DHCP responses.
How severe is CVE-2024-42040?: CVE-2024-42040 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2024-42040 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-42040?: CVE-2024-42040 affects Denx U-boot. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-42040?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-42040 have an EU (EUVD) identifier?: Yes. CVE-2024-42040 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-39870.
When was CVE-2024-42040 published?: CVE-2024-42040 was published on 2024-08-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*

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