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CVE-2026-43303 is a Linux kernel memory-management vulnerability in mm/page_alloc caused by failing to clear page->private when pages are prepared for return to the allocator. Several kernel subsystems, including slub, shmem, and ttm, may store state in page->private and free pages without resetting that field. If such pages are later reallocated as high-order pages and then split with split_page(), tail pages can retain stale page->private values from prior use. The swap subsystem relies on page->private to track swap count continuations and assumes newly allocated pages have page->private set to zero. When stale values persist, swap_count_continued() can incorrectly treat a continuation list as valid and traverse uninitialized page->lru state, resulting in a use-after-free condition and kernel crash. The upstream fix clears page->private in free_pages_prepare() so freed pages are returned in a clean state regardless of prior subsystem use.
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15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel memory management vulnerability related to clearing page->private in free_pages_prepare().
A Linux kernel memory-management vulnerability involving page->private not being cleared in free_pages_prepare().
A Linux kernel memory management vulnerability in free_pages_prepare() related to clearing page->private.
Linux kernel memory management vulnerability related to clearing page->private in free_pages_prepare().
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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