Bug 2487568 (CVE-2026-53689)

Summary: CVE-2026-53689 libnfs: libnfs: Information disclosure and data corruption via crafted NFS server connection
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in libnfs. A remote attacker could exploit a vulnerability related to improper string size validation when a user connects to a specially crafted Network File System (NFS) server. This could lead to an integer overflow, potentially allowing for information disclosure, data corruption, or a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2512002, 2512003    
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Description OSIDB Bzimport 2026-06-10 15:02:53 UTC
libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.