CVE-2023-32256

HIGHNVD 7.57.5—

7.5

A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 41.5%
KEV: Not listed

Published

August 1, 2025

Last Modified

April 15, 2026

References (4)

secalert@redhathttps://access.redhat.com/security/cve/CVE-2023-32256
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2385885
secalert@redhathttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abcc506a9a71976a8b4c9bf3ee6efd13229c1e19
secalert@redhathttps://www.zerodayinitiative.com/advisories/ZDI-23-704/

Weakness Classification(1)

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

CWE-421

Data Freshness Timeline

(refreshed 17× 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.

2026-06-05 06:09 UTCepss_batch
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Frequently asked(5)

What is CVE-2023-32256?

CVE-2023-32256 is a high vulnerability published on August 1, 2025. A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.

When was CVE-2023-32256 disclosed?

CVE-2023-32256 was first published in the National Vulnerability Database on August 1, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-32256 actively exploited?

CVE-2023-32256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 41.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-32256?

CVE-2023-32256 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-32256?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-32256, 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-2023-32256

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-32256?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

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