What’s Vulnerable › Vulnerabilities

CVE-2023-32256: Kernel: ksmbd race issue from smb2 close and logoff with multichannel

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-01 · updated 2026-06-29
• Weakness: CWE-421

Description

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.

References

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

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