Buffer overflow in Zephyrproject Zephyr
CVE-2026-0849
Malformed ATAES132A responses with an oversized length field overflow a 52-byte stack buffer in the Zephyr crypto driver, allowing a compromised device or bus attacker to corrupt kernel memory and potentially hijack execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (13.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Zephyrproject Zephyr — versions 4.3.0
- Zephyrproject-Rtos Zephyr
Weakness classification (CWE)
References
- github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-ff4p-3ggg-prp6 (Exploit, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-0849?
- CVE-2026-0849 is a low-severity vulnerability in Zephyrproject Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 3.8/10. Published 2026-03-16.
- How severe is CVE-2026-0849?
- Low severity. CVSS v3 base score is 3.8 out of 10.