How severe is CVE-2025-59836?

CVE-2025-59836 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-59836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59836?

CVE-2025-59836 affects Siderolabs Omni. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59836?

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

Does CVE-2025-59836 have an EU (EUVD) identifier?

Yes. CVE-2025-59836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34081.

When was CVE-2025-59836 published?

CVE-2025-59836 was published on 2025-10-13 and last updated on 2026-06-17.

CVE-2025-59836

CVE-2025-59836 is a medium-severity vulnerability in Siderolabs Omni with a CVSS 3.x base score of 5.3. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34081
Weakness: CWE-476
Affected product: Siderolabs Omni
Published: 2025-10-13
Last modified: 2026-06-17

Description

Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.1.5 and 1.0.2, there is a nil pointer dereference vulnerability in the Omni Resource Service allows unauthenticated users to cause a server panic and denial of service by sending empty create/update resource requests through the API endpoints. The vulnerability exists in the isSensitiveSpec function which calls grpcomni.CreateResource without checking if the resource's metadata field is nil. When a resource is created with an empty Metadata field, the CreateResource function attempts to access resource.Metadata.Version causing a segmentation fault. This vulnerability is fixed in 1.1.5 and 1.0.2.

Frequently asked questions

What is CVE-2025-59836?: Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.1.5 and 1.0.2, there is a nil pointer dereference vulnerability in the Omni Resource Service allows unauthenticated users to cause a server panic and denial of service by sending empty create/update resource requests through the API endpoints. The vulnerability exists in the isSensitiveSpec function which calls grpcomni.CreateResource without checking if the resource's metadata field is nil. When a resource is created with an empty Metadata field, the CreateResource function attempts to access resource.Metadata.Version causing a segmentation fault. This vulnerability is fixed in 1.1.5 and 1.0.2.
How severe is CVE-2025-59836?: CVE-2025-59836 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-59836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59836?: CVE-2025-59836 affects Siderolabs Omni. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59836?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-59836 have an EU (EUVD) identifier?: Yes. CVE-2025-59836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34081.
When was CVE-2025-59836 published?: CVE-2025-59836 was published on 2025-10-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:siderolabs:omni:*:*:*:*:*:kubernetes:*:*

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