SB20260918434 - Missing Release of Resource after Effective Lifetime in Linux kernel nfsd
Published: September 18, 2026
Security Bulletin ID
SB20260918434
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-90236)
CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime
CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to prevent an export from being unmounted.
The vulnerability exists due to improper resource management in the NFSD stateid reaping logic when reaping open and lock stateids. A remote user can trigger stateid teardown to prevent an export from being unmounted.
Remediation
Install update from vendor's website.