SB20261015154 - Improper Check for Unusual or Exceptional Conditions in Linux kernel nfsd

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-98250)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to trigger pNFS layout initialization for exports without pNFS enabled.

The vulnerability exists due to a missing NFSEXP_PNFS flag check in the nfsd netlink export configuration code when processing export configuration. A local user can submit an export configuration without the NFSEXP_PNFS flag to trigger pNFS layout initialization for exports without pNFS enabled.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/30335038d4e25cf017abb0562f4f4eace4f58f96
• https://git.kernel.org/stable/c/f76017a7663c4ce5e379f8a8d39f032bdb1fd865