Improper resource shutdown or release in Linux kernel - CVE-2026-53342
Published: July 2, 2026
Vulnerability identifier: #VU136707
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-53342
CWE-ID: CWE-404
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 resource shutdown in free_hotplug_pgtable_page() when freeing hot-removed page tables. A local user can trigger memory hot-remove operations to cause a denial of service.
With DEBUG_VM enabled, the issue can trigger a bad page state warning. If ALLOC_SPLIT_PTLOCKS is defined, it can also leak page table lock allocations and corrupt NR_PAGETABLE accounting.
How to mitigate CVE-2026-53342
Install security update from vendor's repository.