CVE-2026-23665
CVE-2026-23665 is a high-severity vulnerability in Microsoft Linux Diagnostic Extension with a CVSS 3.x base score of 7.8. 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-787.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (31st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-10586
- Weakness: CWE-787
- Affected product: Microsoft Linux Diagnostic Extension
- Published:
- Last modified:
Description
Heap-based buffer overflow in Azure Linux Virtual Machines allows an authorized attacker to elevate privileges locally.
Frequently asked questions
- What is CVE-2026-23665?
- Heap-based buffer overflow in Azure Linux Virtual Machines allows an authorized attacker to elevate privileges locally.
- How severe is CVE-2026-23665?
- CVE-2026-23665 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-23665 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-23665?
- CVE-2026-23665 affects Microsoft Linux Diagnostic Extension. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-23665?
- 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-2026-23665 have an EU (EUVD) identifier?
- Yes. CVE-2026-23665 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10586.
- When was CVE-2026-23665 published?
- CVE-2026-23665 was published on 2026-03-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:microsoft:linux_diagnostic_extension:*:*:*:*:*:*:*:*
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