Bug 2467076 (CVE-2026-43193)

Summary: CVE-2026-43193 kernel: nfsd: fix nfs4_file refcount leak in nfsd_get_dir_deleg()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's Network File System Daemon (nfsd). A reference count leak in the `nfsd_get_dir_deleg()` function can lead to resource exhaustion. This vulnerability, if repeatedly triggered, may allow an attacker to cause a Denial of Service (DoS) by consuming available system resources.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 13:02:58 UTC
In the Linux kernel, the following vulnerability has been resolved:

nfsd: fix nfs4_file refcount leak in nfsd_get_dir_deleg()

Claude pointed out that there is a nfs4_file refcount leak in
nfsd_get_dir_deleg(). Ensure that the reference to "fp" is released
before returning.