CVE-2026-53689: CWE-1284 Improper Validation of Specified Quantity in Input in sahlberg libnfs
A vulnerability in libnfs versions up to and including 6.0.2 allows improper validation of string size, causing an integer overflow during connection to a crafted NFS server. This occurs in the libnfs_zdr_string function. The issue can lead to high impact on confidentiality and integrity, with low impact on availability.
AI Analysis
Technical Summary
CVE-2026-53689 is a vulnerability in the sahlberg libnfs library (versions <=6.0.2) where the function libnfs_zdr_string in lib/libnfs-zdr.c does not properly validate the size of a string input. This improper validation can cause an integer overflow when connecting to a maliciously crafted NFS server. The vulnerability is classified under CWE-1284 (Improper Validation of Specified Quantity in Input). The CVSS 3.1 base score is 7.1, indicating high severity with network attack vector, high attack complexity, no privileges required, user interaction required, unchanged scope, and high confidentiality and integrity impact but low availability impact. No official patch or remediation level has been provided yet.
Potential Impact
Successful exploitation can lead to compromise of confidentiality and integrity of the affected system due to the integer overflow triggered by malformed input from a crafted NFS server. Availability impact is low. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid connecting to untrusted or malicious NFS servers to mitigate risk.
CVE-2026-53689: CWE-1284 Improper Validation of Specified Quantity in Input in sahlberg libnfs
Description
A vulnerability in libnfs versions up to and including 6.0.2 allows improper validation of string size, causing an integer overflow during connection to a crafted NFS server. This occurs in the libnfs_zdr_string function. The issue can lead to high impact on confidentiality and integrity, with low impact on availability.
CVSS v3.1
Score 7.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-53689 is a vulnerability in the sahlberg libnfs library (versions <=6.0.2) where the function libnfs_zdr_string in lib/libnfs-zdr.c does not properly validate the size of a string input. This improper validation can cause an integer overflow when connecting to a maliciously crafted NFS server. The vulnerability is classified under CWE-1284 (Improper Validation of Specified Quantity in Input). The CVSS 3.1 base score is 7.1, indicating high severity with network attack vector, high attack complexity, no privileges required, user interaction required, unchanged scope, and high confidentiality and integrity impact but low availability impact. No official patch or remediation level has been provided yet.
Potential Impact
Successful exploitation can lead to compromise of confidentiality and integrity of the affected system due to the integer overflow triggered by malformed input from a crafted NFS server. Availability impact is low. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid connecting to untrusted or malicious NFS servers to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-10T13:44:27.756Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2979aec9170919df2db222
Added to database: 06/10/2026, 14:50:22 UTC
Last enriched: 06/24/2026, 17:17:11 UTC
Last updated: 07/15/2026, 07:47:31 UTC
Views: 104
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