How severe is CVE-2026-4892?

CVE-2026-4892 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-4892 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4892?

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-2026-4892 have an EU (EUVD) identifier?

Yes. CVE-2026-4892 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29154.

When was CVE-2026-4892 published?

CVE-2026-4892 was published on 2026-05-11 and last updated on 2026-07-02.

CVE-2026-4892

CVE-2026-4892 is a high-severity vulnerability with a CVSS 3.x base score of 8.4. 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-122.

Key facts

Severity: High (CVSS 3.x base score 8.4)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29154
Weakness: CWE-122
Published: 2026-05-11
Last modified: 2026-07-02

Description

A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.

Frequently asked questions

What is CVE-2026-4892?: A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.
How severe is CVE-2026-4892?: CVE-2026-4892 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-4892 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4892?: 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-2026-4892 have an EU (EUVD) identifier?: Yes. CVE-2026-4892 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29154.
When was CVE-2026-4892 published?: CVE-2026-4892 was published on 2026-05-11 and last updated on 2026-07-02.

References

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