How severe is CVE-2025-26465?

CVE-2025-26465 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-26465 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-26465?

CVE-2025-26465 primarily affects Redhat Openshift Container Platform. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-26465?

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

Does CVE-2025-26465 have an EU (EUVD) identifier?

Yes. CVE-2025-26465 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4686.

When was CVE-2025-26465 published?

CVE-2025-26465 was published on 2025-02-18 and last updated on 2026-06-17.

CVE-2025-26465

CVE-2025-26465 is a medium-severity vulnerability in Redhat Openshift Container Platform with a CVSS 3.x base score of 6.8. 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-390.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-4686
Weakness: CWE-390
Affected product: Redhat Openshift Container Platform
Published: 2025-02-18
Last modified: 2026-06-17

Description

A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.

Frequently asked questions

What is CVE-2025-26465?: A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
How severe is CVE-2025-26465?: CVE-2025-26465 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-26465 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-26465?: CVE-2025-26465 primarily affects Redhat Openshift Container Platform. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-26465?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-26465 have an EU (EUVD) identifier?: Yes. CVE-2025-26465 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4686.
When was CVE-2025-26465 published?: CVE-2025-26465 was published on 2025-02-18 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:6.8:p1:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:9.9:-:*:*:*:*:*:*
cpe:2.3:a:openbsd:openssh:9.9:p1:*:*:*:*:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:ontap:9:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

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CVE-2025-27039 — Medium (CVSS 6.6): Memory corruption may occur while processing IOCTL call for DMM/WARPNCC CONFIG request.
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Threat intelligence

Threat-intel indicators referencing this CVE:

152.32.208.73 (ipv4-addr)
152.32.217.163 (ipv4-addr)
152.32.204.21 (ipv4-addr)
152.32.145.49 (ipv4-addr)
104.218.164.192 (ipv4-addr)
165.154.162.193 (ipv4-addr)
165.154.11.210 (ipv4-addr)
152.32.207.42 (ipv4-addr)