CVE-2026-89098: Reachable Assertion in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-89098 is a vulnerability in the nfs-utils package on Red Hat Enterprise Linux 10 where the fsidd daemon improperly handles malformed input on its local domain socket. A local user can cause the daemon to crash by sending a request missing required arguments, resulting in a denial of service for filesystem identifier lookup services until the daemon is restarted.
CVSS v3.1
Score 5.5medium
Affected software
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat OpenShift Container Platform 4
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the fsidd daemon of nfs-utils on Red Hat Enterprise Linux 10. The daemon relies on program assertions to validate command arguments received over its local domain socket. If a local user sends a malformed request lacking required arguments, it triggers an assertion failure causing the daemon to crash. This leads to a denial of service affecting filesystem identifier lookup services until the daemon is manually restarted.
Potential Impact
An attacker with local access can cause the fsidd daemon to crash, resulting in denial of service for filesystem identifier lookup services. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-89098 for current remediation guidance. Until a fix is applied, avoid sending malformed requests to the fsidd daemon. Restarting the daemon restores service after a crash.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-10T21:02:15.176Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-89098","vendor":"Red Hat"}]
Threat ID: 6ad264092cdf04f65619952f
Added to database: 10/16/2026, 17:51:05 UTC
Last enriched: 10/16/2026, 19:06:56 UTC
Last updated: 10/17/2026, 00:48:08 UTC
Views: 7
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.