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CVE-2026-43303 is a use-after-free vulnerability in Linux kernel memory management and swap handling. Subsystems including SLUB, shmem, and TTM can free pages without clearing page->private. When those pages are subsequently allocated as high-order pages and split by split_page(), tail pages retain stale metadata. The swap subsystem assumes newly allocated pages have zeroed page->private values and uses this field to track swap-count continuations. Stale values cause swap_count_continued() to treat an invalid continuation list as valid and traverse uninitialized page->lru data containing LIST_POISON values, potentially crashing the kernel during swapoff processing.
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A Linux kernel page-allocation vulnerability addressed by clearing page->private in free_pages_prepare(). Security updates are available for affected Rocky Linux 10.2 kernel packages.
A Linux kernel use-after-free vulnerability caused by stale page->private values retained in freed pages. The swap subsystem can interpret these values as valid swap-count continuation metadata and traverse an uninitialized list, causing a crash. The fix clears page->private in free_pages_prepare(). The reference assigns a CVSS v3 base score of 7.8, with local access and low privileges required.
A Linux kernel page-allocation flaw leaves stale page->private values in freed pages. After allocation and splitting, these values can cause the swap subsystem to traverse an invalid continuation list, resulting in a use-after-free and kernel crash. The reference rates the vulnerability High with a CVSS v3 base score of 7.8 and identifies local access with low privileges as prerequisites. The fix clears page->private in free_pages_prepare().
A Linux kernel memory management vulnerability related to clearing page->private in free_pages_prepare().
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Cross-references every affected SKU, including bundled OEM variants.
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