How severe is CVE-2025-10456?

CVE-2025-10456 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2025-10456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-10456?

CVE-2025-10456 affects Zephyrproject Zephyr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-10456?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-10456 have an EU (EUVD) identifier?

Yes. CVE-2025-10456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30238.

When was CVE-2025-10456 published?

CVE-2025-10456 was published on 2025-09-19 and last updated on 2026-06-17.

CVE-2025-10456

CVE-2025-10456 is a high-severity vulnerability in Zephyrproject Zephyr with a CVSS 3.x base score of 7.1. 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-190.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-30238
Weakness: CWE-190
Affected product: Zephyrproject Zephyr
Published: 2025-09-19
Last modified: 2026-06-17

Description

A vulnerability was identified in the handling of Bluetooth Low Energy (BLE) fixed channels (such as SMP or ATT). Specifically, an attacker could exploit a flaw that causes the BLE target (i.e., the device under attack) to attempt to disconnect a fixed channel, which is not allowed per the Bluetooth specification. This leads to undefined behavior, including potential assertion failures, crashes, or memory corruption, depending on the BLE stack implementation.

Frequently asked questions

What is CVE-2025-10456?: A vulnerability was identified in the handling of Bluetooth Low Energy (BLE) fixed channels (such as SMP or ATT). Specifically, an attacker could exploit a flaw that causes the BLE target (i.e., the device under attack) to attempt to disconnect a fixed channel, which is not allowed per the Bluetooth specification. This leads to undefined behavior, including potential assertion failures, crashes, or memory corruption, depending on the BLE stack implementation.
How severe is CVE-2025-10456?: CVE-2025-10456 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2025-10456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-10456?: CVE-2025-10456 affects Zephyrproject Zephyr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-10456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-10456 have an EU (EUVD) identifier?: Yes. CVE-2025-10456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30238.
When was CVE-2025-10456 published?: CVE-2025-10456 was published on 2025-09-19 and last updated on 2026-06-17.

References

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hcc8-3qr7-c9m8

Affected products (1)

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

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