CVE-2026-53689

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Source
https://cve.org/CVERecord?id=CVE-2026-53689
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53689.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-53689
Downstream
Related
Published
2026-06-10T13:44:28Z
Modified
2026-08-18T18:39:07Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "cna_assigner":  "mitre",
    "cwe_ids":  [
        "CWE-1284"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53689.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "fixed":  "55c18ea33a83d667f79f0ef209c96895795c729f"
                }
            ],
            "source":  "AFFECTED_FIELD"
        },
        {
            "extracted_events":  [
                {
                    "fixed":  "55c18ea"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}
References

Affected packages

Git / github.com/sahlberg/libnfs

Affected ranges

Type
GIT
Repo
https://github.com/sahlberg/libnfs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
18c5c73ee88bb7dc8da0d55dc95164bb77e49dc6
Fixed
55c18ea33a83d667f79f0ef209c96895795c729f
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "6.0.2"
        }
    ],
    "source":  [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

libnfs-1.*
libnfs-1.10.0
libnfs-1.11.0
libnfs-1.2.0
libnfs-1.3.0
libnfs-1.4.0
libnfs-1.5.0
libnfs-1.6.0
libnfs-1.7.0
libnfs-1.8.0
libnfs-1.9.0
libnfs-1.9.2
libnfs-1.9.3
libnfs-1.9.4
libnfs-1.9.5
libnfs-1.9.6
libnfs-1.9.7
libnfs-1.9.8
libnfs-2.*
libnfs-2.0.0
libnfs-3.*
libnfs-3.0.0
libnfs-4.*
libnfs-4.0.0
libnfs-5.*
libnfs-5.0.0
libnfs-5.0.1
libnfs-5.0.2
libnfs-5.0.3
libnfs-6.*
libnfs-6.0.0
libnfs-6.0.1
libnfs-6.0.2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53689.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "83870009917490689280084441033708128134",
            "length":  798
        },
        "id":  "CVE-2026-53689-77333930",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/sahlberg/libnfs/commit/55c18ea33a83d667f79f0ef209c96895795c729f",
        "target":  {
            "file":  "lib/libnfs-zdr.c",
            "function":  "libnfs_zdr_string"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "235645024087608653564087448180377933402",
                "38888506908758065524695896210726654420",
                "63003251782889789835488708502367478605"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-53689-d15505ae",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/sahlberg/libnfs/commit/55c18ea33a83d667f79f0ef209c96895795c729f",
        "target":  {
            "file":  "lib/libnfs-zdr.c"
        }
    }
]
vanir_signatures_modified 
"2026-08-18T18:39:07Z"