SB20260507148 - Missing Release of Resource after Effective Lifetime in Linux kernel nfsd
Published: May 7, 2026
Security Bulletin ID
SB20260507148
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
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-2026-43193)
CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a reference count leak in nfsd_get_dir_deleg() when handling directory delegations. A local user can trigger the vulnerable code path to cause a denial of service.
Remediation
Install update from vendor's website.