How severe is CVE-2026-5164?

CVE-2026-5164 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-5164 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5164?

CVE-2026-5164 primarily affects Redhat Virtio-win. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-5164?

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

Does CVE-2026-5164 have an EU (EUVD) identifier?

Yes. CVE-2026-5164 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17111.

When was CVE-2026-5164 published?

CVE-2026-5164 was published on 2026-03-30 and last updated on 2026-06-17.

CVE-2026-5164

CVE-2026-5164 is a medium-severity vulnerability in Redhat Virtio-win with a CVSS 3.x base score of 6.7. 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 6.7)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17111
Weakness: CWE-120
Affected product: Redhat Virtio-win
Published: 2026-03-30
Last modified: 2026-06-17

Description

A flaw was found in virtio-win. The `RhelDoUnMap()` function does not properly validate the number of descriptors provided by a user during an unmap request. A local user could exploit this input validation vulnerability by supplying an excessive number of descriptors, leading to a buffer overrun. This can cause a system crash, resulting in a Denial of Service (DoS).

Frequently asked questions

What is CVE-2026-5164?: A flaw was found in virtio-win. The `RhelDoUnMap()` function does not properly validate the number of descriptors provided by a user during an unmap request. A local user could exploit this input validation vulnerability by supplying an excessive number of descriptors, leading to a buffer overrun. This can cause a system crash, resulting in a Denial of Service (DoS).
How severe is CVE-2026-5164?: CVE-2026-5164 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-5164 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5164?: CVE-2026-5164 primarily affects Redhat Virtio-win. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-5164?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5164 have an EU (EUVD) identifier?: Yes. CVE-2026-5164 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17111.
When was CVE-2026-5164 published?: CVE-2026-5164 was published on 2026-03-30 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:redhat:virtio-win:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

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