Kernel warnings via incomplete pageblock type updates
Published Jan 14, 2026 · Updated Jan 14, 2026
Memory-management inconsistency in Linux Kernel 6.10 and affected later branches causes kernel warnings during page allocation. The buddy-coalescing path in mm/page_alloc.c updates only the first pageblock when the buddy's migration type differs, leaving the remaining pageblocks inconsistent with the free list. The published reproducer runs as UID 0 under sustained memory stress; the record establishes warnings in expand() and related paths, not an unprivileged trigger, crash, or data compromise.
Summary
What happened
Memory-management inconsistency in Linux Kernel 6.10 and affected later branches causes kernel warnings during page allocation. The buddy-coalescing path in mm/page_alloc.c updates only the first pageblock when the buddy's migration type differs, leaving the remaining pageblocks inconsistent with the free list. The published reproducer runs as UID 0 under sustained memory stress; the record establishes warnings in expand() and related paths, not an unprivileged trigger, crash, or data compromise.
The record
- CVE
- CVE-2025-71134
- Published
- Jan 14, 2026
- Updated
- Jan 14, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Jan 14, 2026CVE publishedPublication date reported by the CVE source.
- Jan 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.10
- Affected versionversion=e6cf9e1c4cde8a53385423ecb8ca581097f42e02 <7838a4eb8a1d23160bd3f588ea7f2b8f7c00c55b
- Affected versionversion=e6cf9e1c4cde8a53385423ecb8ca581097f42e02 <914769048818021556c940b9163e8056be9507dd
- Affected versionversion=e6cf9e1c4cde8a53385423ecb8ca581097f42e02 <a794d65b132107a085d165caba33aae1101316a5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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