CVE-2026-23432

HIGHNVD 7.87.8—

7.8

In the Linux kernel, the following vulnerability has been resolved:

mshv: Fix use-after-free in mshv_map_user_memory error path

In the error path of mshv_map_user_memory(), calling vfree() directly on the region leaves the MMU notifier registered. When userspace later unmaps the memory, the notifier fires and accesses the freed region, causing a use-after-free and potential kernel panic.

Replace vfree() with mshv_partition_put() to properly unregister the MMU notifier before freeing the region.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 4.3%
KEV: Not listed

Published

April 3, 2026

Last Modified

April 27, 2026

References (2)

416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34861bdc0c0196b6c2dd48f7454029407704ff6e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6922db250422a0dfee34de322f86b7a73d713d33

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-416Use After Free

Data Freshness Timeline

(refreshed 18× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2026-23432?

CVE-2026-23432 is a high vulnerability published on April 3, 2026. In the Linux kernel, the following vulnerability has been resolved: mshv: Fix use-after-free in mshvmapuser_memory error path In the error path of mshvmapuser_memory(), calling vfree() directly on the region leaves the MMU notifier registered. When userspace later unmaps the memory, the notifier…

When was CVE-2026-23432 disclosed?

CVE-2026-23432 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on April 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-23432 actively exploited?

CVE-2026-23432 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-23432?

CVE-2026-23432 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2026-23432?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23432, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-23432

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-23432?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)