CVE-2023-32256

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-08-01. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
41.4%
KEV
Not listed

Published

August 1, 2025

Last Modified

June 29, 2026

Advisory Details (4)

Auto-updated Jun 25, 2026
Patch available. Sources: redhat.
generic

ZDI-23-704 - TrendAI™ Zero Day Initiative™ (ZDI)

https://www.zerodayinitiative.com/advisories/ZDI-23-704/
generic

ksmbd: fix racy issue from smb2 close and logoff with multichannel - kernel/git/torvalds/linux.git - Linux kernel source tree

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abcc506a9a71976a8b4c9bf3ee6efd13229c1e19
redhat

2385885 – (CVE-2023-32256) CVE-2023-32256 kernel: ksmbd race issue from smb2 close and logoff with multichannel

https://bugzilla.redhat.com/show_bug.cgi?id=2385885
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2023-32256

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 136 total refreshes for this CVE.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
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  1. 2026-07-08 15:13 UTCEPSS rescore
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  27. 2026-06-21 19:12 UTCOSV refresh
  28. 2026-06-21 14:55 UTCEPSS rescore
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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 June 29, 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 41.4% 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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