What is CVE-2025-1673?

CVE-2025-1673 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2025-02-25.

How severe is CVE-2025-1673?

High severity. CVSS v3 base score is 8.2 out of 10.

Out-of-bounds Read in Zephyrproject Zephyr

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.

Vulnerability class: Buffer Overflow

Published 2025-02-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

EPSS exploit prediction

EPSS: 0.004 (26.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-jjhx-rrh4-j8mx (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2025-1673?: CVE-2025-1673 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2025-02-25.
How severe is CVE-2025-1673?: High severity. CVSS v3 base score is 8.2 out of 10.