How severe is CVE-2025-1673?

CVE-2025-1673 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2025-1673 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-1673?

CVE-2025-1673 affects Zephyrproject Zephyr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-1673?

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-2025-1673 have an EU (EUVD) identifier?

Yes. CVE-2025-1673 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-5069.

When was CVE-2025-1673 published?

CVE-2025-1673 was published on 2025-02-25 and last updated on 2026-06-17.

CVE-2025-1673

CVE-2025-1673 is a high-severity vulnerability in Zephyrproject Zephyr with a CVSS 3.x base score of 8.2. 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: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-5069
Weakness: CWE-125
Affected product: Zephyrproject Zephyr
Published: 2025-02-25
Last modified: 2026-06-17

Description

A malicious or malformed DNS packet without a payload can cause an out-of-bounds read, resulting in a crash (denial of service) or an incorrect computation.

Frequently asked questions

What is CVE-2025-1673?: A malicious or malformed DNS packet without a payload can cause an out-of-bounds read, resulting in a crash (denial of service) or an incorrect computation.
How severe is CVE-2025-1673?: CVE-2025-1673 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2025-1673 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-1673?: CVE-2025-1673 affects Zephyrproject Zephyr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-1673?: 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-2025-1673 have an EU (EUVD) identifier?: Yes. CVE-2025-1673 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-5069.
When was CVE-2025-1673 published?: CVE-2025-1673 was published on 2025-02-25 and last updated on 2026-06-17.

References

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-jjhx-rrh4-j8mx

Affected products (1)

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

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