CVE-2026-57918

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.

Published: 2026-06-26 Last update: 2026-06-26 Assigner: [email protected] Source: [email protected]
NVD Status：Awaiting Analysis，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-57918 is rated Low Risk (31.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.19%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-57918

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-27 — 0.19% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-57918

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.6 5.5 [email protected]

Weakness enumeration for CVE-2026-57918

GitHub Security Advisory for CVE-2026-57918

GHSA-27p2-fpv6-cj8c · Severity: high — libnfs through 6.0.2 before 935b8db has an xid integer underflow in READ_IOVEC in...

OS Trackers for CVE-2026-57918

vendor priority summary link
debian unimportant CVE-2026-57918 unimportant priority: Debian including 1 source packages (libnfs), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-57918
suse high CVE-2026-57918 severity important: SUSE including 5 source package names (libnfs, libnfs-devel, libnfs14, libnfs8, utils-libnfs), 49 product×package rows across 18 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS, … (18 product lines)): Known Not Affected 49. https://www.suse.com/security/cve/CVE-2026-57918/
ubuntu medium CVE-2026-57918 medium priority: Ubuntu including 1 source packages (libnfs), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, resolute, upstream): not-affected 7. https://ubuntu.com/security/CVE-2026-57918

Affected software / configurations for CVE-2026-57918

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-57918

cvelogic Threat Intelligence