How severe is CVE-2026-0849?

CVE-2026-0849 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over physical access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-0849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0849?

CVE-2026-0849 primarily affects Zephyrproject Zephyr. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-0849?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-0849 have an EU (EUVD) identifier?

Yes. CVE-2026-0849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12186.

When was CVE-2026-0849 published?

CVE-2026-0849 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-0849

CVE-2026-0849 is a low-severity vulnerability in Zephyrproject Zephyr with a CVSS 3.x base score of 3.8. 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: Low (CVSS 3.x base score 3.8)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12186
Weakness: CWE-120
Affected product: Zephyrproject Zephyr
Published: 2026-03-16
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-0849?: CVE-2026-0849 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over physical access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-0849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0849?: CVE-2026-0849 primarily affects Zephyrproject Zephyr. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-0849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0849 have an EU (EUVD) identifier?: Yes. CVE-2026-0849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12186.
When was CVE-2026-0849 published?: CVE-2026-0849 was published on 2026-03-16 and last updated on 2026-06-17.

References

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

Affected products (4)

cpe:2.3:o:zephyrproject:zephyr:4.3.0:-:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc1:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc2:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc3:*:*:*:*:*:*

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