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CVE-2024-26759 is a race condition in Linux kernel memory-management swap handling when swapcache is skipped for SWP_SYNCHRONOUS_IO. Concurrent faults for the same swap entry can independently read that entry into separate pages. If one thread installs its page, frees the swap entry, and the entry is reused before another delayed thread completes, the delayed thread's pte_same() check can succeed despite the swap-entry ABA condition. It can then install a stale page into the page-table entry. On ZRAM, freeing the entry can also discard its contents before a concurrent read completes. The upstream correction pins the swap entry via swapcache_prepare(), serializes swap-in for the entry, and releases the pin after the page-table lock is released.
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A race condition in Linux kernel memory-management swap-cache handling.
A race condition in Linux kernel memory-management swapcache handling.
Linux kernel memory-management swap-cache race condition.
Linux kernel memory-management swapcache race condition.
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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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