SB2026040638 - Missing Release of Resource after Effective Lifetime in Linux kernel sunrpc

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Main Vulnerability Database SB2026040638

SB2026040638 - Missing Release of Resource after Effective Lifetime in Linux kernel sunrpc

Published: April 6, 2026

Security Bulletin ID SB2026040638
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-31400)

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:L/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 improper resource management in cache_release when closing a reader file descriptor during a partial read of a cache_request. A local user can close a file descriptor in that state to cause a denial of service.

The issue occurs because the request readers count is decremented without freeing the cache_request when the count reaches zero and CACHE_PENDING is clear, which can result in a memory leak.


Remediation

Install update from vendor's website.

References