Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-46100
Published: May 27, 2026
Vulnerability identifier: #VU132395
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-46100
CWE-ID: CWE-772
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper reference count management in the afs mmap handling code when preparing memory mappings. A local user can trigger memory mapping operations to cause a denial of service.
The issue can occur if a merge or allocation failure happens after the preparation step, leading to a leaked reference count increment.
How to mitigate CVE-2026-46100
Install security update from vendor's repository.