CVE-2026-57918

highCVSS 7.1covered by 2 sourcesfirst seen 2026-06-09

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.

CSIRTS triage

vendor: libnfs product: libnfsOtheraffected: through 6.0.2 before 935b8db

What: There is an integer underflow vulnerability in the READ_IOVEC function during a connection to a crafted NFS server.
Who is affected: Deployments of libnfs versions through 6.0.2 before commit 935b8db are affected.
Urgency: Remediation is urgent due to the high severity of the vulnerability with a CVSS score of 7.1.
Action: Upgrade to libnfs version 6.0.2 after commit 935b8db.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all EPSS-scored CVEs.

Advisory coverage (2)

highCVE-2026-57918: libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_fro…nvd · 2026-06-26
highCVE-2026-57918: libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in rpc_read_fro…msrc · 2026-06-09

External references

NVD record for CVE-2026-57918

CVE.org record

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