In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unmap race with PMD migration entries The following race is… (CVE-2026-53108)
A race condition vulnerability in the Linux kernel on powerpc/64s architectures involving unmap operations with PMD migration entries has been resolved. The issue occurs when move_pages() and munmap() syscalls run concurrently, leading to a kernel BUG due to inconsistent PMD entry states. This race can cause kernel crashes on affected systems. The vulnerability is related to migration swap entries and device-private transparent huge pages (THP).
AI Analysis
Technical Summary
The vulnerability involves a race condition in the Linux kernel's powerpc/64s memory management code, specifically with PMD migration entries used during page migration and unmap operations. When move_pages() is called on a PMD THP page, the PMD entry temporarily acts as a migration swap entry. If munmap() occurs concurrently, a VM_BUG_ON() check in pmdp_huge_get_and_clear_full() can trigger a kernel BUG due to the PMD entry being in an unexpected state. This race condition was fixed by a patch that ensures proper synchronization and state handling of PMD migration entries during concurrent move_pages() and munmap() operations.
Potential Impact
This vulnerability can cause kernel crashes (denial of service) on powerpc/64s systems running affected Linux kernel versions. It does not impact confidentiality or integrity but affects system availability due to kernel BUGs triggered by the race condition.
Mitigation Recommendations
A patch has been applied to the Linux kernel to fix this race condition vulnerability. Users should update to a Linux kernel version that includes this fix. Since no specific patch links or fixed versions are provided, users should consult the official Linux kernel advisories or their distribution's security updates for the corrected kernel version. No additional mitigation is indicated.
In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix unmap race with PMD migration entries The following race is… (CVE-2026-53108)
Description
A race condition vulnerability in the Linux kernel on powerpc/64s architectures involving unmap operations with PMD migration entries has been resolved. The issue occurs when move_pages() and munmap() syscalls run concurrently, leading to a kernel BUG due to inconsistent PMD entry states. This race can cause kernel crashes on affected systems. The vulnerability is related to migration swap entries and device-private transparent huge pages (THP).
CVSS v3.1
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability involves a race condition in the Linux kernel's powerpc/64s memory management code, specifically with PMD migration entries used during page migration and unmap operations. When move_pages() is called on a PMD THP page, the PMD entry temporarily acts as a migration swap entry. If munmap() occurs concurrently, a VM_BUG_ON() check in pmdp_huge_get_and_clear_full() can trigger a kernel BUG due to the PMD entry being in an unexpected state. This race condition was fixed by a patch that ensures proper synchronization and state handling of PMD migration entries during concurrent move_pages() and munmap() operations.
Potential Impact
This vulnerability can cause kernel crashes (denial of service) on powerpc/64s systems running affected Linux kernel versions. It does not impact confidentiality or integrity but affects system availability due to kernel BUGs triggered by the race condition.
Mitigation Recommendations
A patch has been applied to the Linux kernel to fix this race condition vulnerability. Users should update to a Linux kernel version that includes this fix. Since no specific patch links or fixed versions are provided, users should consult the official Linux kernel advisories or their distribution's security updates for the corrected kernel version. No additional mitigation is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2377-3vvp-rhhq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-53108"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a629b119c2644c7f8d8685b
Added to database: 07/23/2026, 22:52:01 UTC
Last enriched: 07/23/2026, 22:56:12 UTC
Last updated: 07/24/2026, 01:07:38 UTC
Views: 6
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