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CVE-2026-57918

Quick assessment

Affected
sahlberg libnfs
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ronnie Sahlberg libnfs是Ronnie Sahlberg个人开发者的一个访问网络文件系统的库。 Ronnie Sahlberg libnfs存在数字错误漏洞，该漏洞源于在连接特制NFS服务器时，lib/socket.c中的rpc_read_from_socket的READ_IOVEC函数中存在xid整数下溢问题，当预期的PDU大小超过来自xid/record-marker的绝对PDU大小时触发。以下版本受到影响：6.0.2及之前版本。

CVSS 7.1 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
sahlberg libnfs < 935b8db712b3c6649bc57ddc276526c4a31680de affected
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I. Basic Information for CVE-2026-57918

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_from_socket in lib/socket.c during a connection to a crafted NFS server, when the expected pdu size exceeds the absolute pdu size from the xid/record-marker.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
Ronnie Sahlberg libnfs 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ronnie Sahlberg libnfs是Ronnie Sahlberg个人开发者的一个访问网络文件系统的库。 Ronnie Sahlberg libnfs存在数字错误漏洞，该漏洞源于在连接特制NFS服务器时，lib/socket.c中的rpc_read_from_socket的READ_IOVEC函数中存在xid整数下溢问题，当预期的PDU大小超过来自xid/record-marker的绝对PDU大小时触发。以下版本受到影响：6.0.2及之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sahlberg libnfs 0 ~ 935b8db712b3c6649bc57ddc276526c4a31680de -

II. Public POCs for CVE-2026-57918

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11116 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-57918

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Patches & Fixes for CVE-2026-57918 (1)

IV. Related Vulnerabilities

Same product: libnfs
Same vendor: sahlberg
Same weakness: CWE-191

V. Comments for CVE-2026-57918

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