Vulnary
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Critical· 9.8official fix available

CVE-2026-89702

CVE-2026-89702 is a critical kernel memory‑corruption bug in the NFS server code that can be triggered by crafted UDP NFS requests. The issue has been fixed by correcting the size of the server sockaddr slot in the nfsd tracepoints.

publishedSep 11, 2026
last modifiedSep 13, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
6th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Oct 13, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Linux systems running NFS over UDP

02

Real-world impact

An attacker could cause a kernel crash or memory corruption leading to a denial-of-service or potential code execution

03

Why this severity

CVSS score 9.8 reflects remote, unauthenticated access with high impact on confidentiality, integrity, and availability

04

What to do about it

official fix available
recommended steps
  1. 01Update the Linux kernel to a version that includes the fix for CVE-2026-89702

NVD-referenced Linux kernel advisory

05

Timeline

  1. Sep 11, 2026 · 2d ago
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Sep 13, 2026 · 7h ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →