What is CVE-2026-0849?

CVE-2026-0849 is a low-severity vulnerability in Zephyrproject-rtos Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 3.8/10. Published 2026-03-14.

How severe is CVE-2026-0849?

Low severity. CVSS v3 base score is 3.8 out of 10.

Buffer overflow in Zephyrproject-rtos 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

EPSS: 0.000 (7.5th percentile) — read the EPSS interpretation.

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.

Affected products

Zephyrproject-rtos Zephyr

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-ff4p-3ggg-prp6

Frequently asked questions

What is CVE-2026-0849?: CVE-2026-0849 is a low-severity vulnerability in Zephyrproject-rtos Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 3.8/10. Published 2026-03-14.
How severe is CVE-2026-0849?: Low severity. CVSS v3 base score is 3.8 out of 10.