SB20260925144 - Race condition in Linux kernel nfsd

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-93229)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to obtain inconsistent RPC request status information.

The vulnerability exists due to a missing read memory barrier in nfsd_nl_rpc_status_get_dumpit() when reporting RPC request status through a dump operation. A local user can request RPC status information during concurrent request-status updates to obtain inconsistent RPC request status information.

The issue occurs on weakly ordered architectures such as ARM and POWER.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1aea0482b98ecd7d0249204665f2ad4ad517f66b
• https://git.kernel.org/stable/c/9b5f6475006cd8e3b5b99b8eb3cd74dbb1ce9df8
• https://git.kernel.org/stable/c/a71f161a857117e8e0264deb7d14fff5c98adcf5
• https://git.kernel.org/stable/c/f501f2f4ec1d2dfe39e21c98630314074a9b30b0