CVE-2026-64302
kernel: x86/mm: Fix freeing of PMD-sized vmemmap pages
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Severity
UnknownRed Hat Product Security
CVSS
Review impact separately from score.
Published · July 25, 2026
Updated · July 29, 2026
Description
A flaw was found in the Linux kernel. A local user could exploit an issue in the pagetable_free() function, which incorrectly handles vmemmap pages. This improper memory management leads to a memory leak, where only a portion of the allocated memory is freed. Consequently, this can result in a Denial of Service (DoS) due to resource exhaustion.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CWE-772 · Missing Release of Resource after Effective Lifetime