How severe is CVE-2023-5139?

CVE-2023-5139 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.

Is CVE-2023-5139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5139?

CVE-2023-5139 affects Zephyrproject Zephyr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-5139?

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

When was CVE-2023-5139 published?

CVE-2023-5139 was published on 2023-10-26 and last updated on 2026-06-17.

CVE-2023-5139

CVE-2023-5139 is a medium-severity vulnerability in Zephyrproject Zephyr with a CVSS 3.x base score of 4.4. 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: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Zephyrproject Zephyr
Published: 2023-10-26
Last modified: 2026-06-17

Description

Potential buffer overflow vulnerability at the following location in the Zephyr STM32 Crypto driver

Frequently asked questions

What is CVE-2023-5139?: Potential buffer overflow vulnerability at the following location in the Zephyr STM32 Crypto driver
How severe is CVE-2023-5139?: CVE-2023-5139 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability low.
Is CVE-2023-5139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5139?: CVE-2023-5139 affects Zephyrproject Zephyr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-5139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-5139 published?: CVE-2023-5139 was published on 2023-10-26 and last updated on 2026-06-17.

References

Affected products (1)

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

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