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CVE-2026-53689

31
FAUCET Score

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.

First published: Jun 10, 2026Last modified: Jun 10, 2026

Impacted Technologies

VendorProductVersion(s)CPE
SahlbergLibnfs
>= 0, < 55c18ea33a83d667f79f0ef209c96895795c729fCNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
1.6
Impact Score
5.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
11.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 8th percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.6 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: azl3 libnfs 5.0.2-1 on Azure Linux 3.0Fixed in: 5.0.2-2
microsoftpatch availablevia msrc
Product: 21458-17084Fixed in: 5.0.2-2

Vendor Advisories (1)

microsoft2026-Jun/CVE-2026-53689Moderate

CVE-2026-53689

Jun 9, 2026

References

lists.debian.org / debian-lts-announce/2026/07/msg00031.html
github.com / sahlberg/libnfs/commit/55c18ea33a83d667f79f0ef209c96895795c729f