{"id":"CVE-2026-89995","published":"2026-09-16T11:17:10.707","lastModified":"2026-09-16T15:18:23.157","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndma-direct: return struct page from dma_direct_alloc_from_pool()\n\nCommit 5b138c534fda (\"dma-direct: factor out a dma_direct_alloc_from_pool\nhelper\") changed dma_direct_alloc_from_pool() to return the CPU address\nfrom dma_alloc_from_pool(). That fits dma_direct_alloc(), but\ndma_direct_alloc_pages() also uses the helper and expects a struct page *.\n\nFix this by making dma_direct_alloc_from_pool() return the struct page *\nagain, and pass the CPU address back through an out-parameter for the\ndma_direct_alloc() caller.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/408ff2d5bf555bd3f4c84a2edb95c0690bf9edc8","tags":[]},{"url":"https://git.kernel.org/stable/c/94a04ad732c9f8b9554270fc4038a06737de5c22","tags":[]},{"url":"https://git.kernel.org/stable/c/c3fdb94da43ff23287f85664174c45c45e881a3f","tags":[]},{"url":"https://git.kernel.org/stable/c/feeb2ef775081a6c188cdd10e7a45369a07ce531","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This flaw involves a return type mismatch in the `dma_direct_alloc_from_pool` function, leading to incorrect handling of `struct page *`. It matters because it could allow an attacker to manipulate memory allocations, potentially leading to privilege escalation or other severe consequences.","exploitability":"Exploitation requires specific kernel context and understanding of DMA memory management. Precondition is the presence of a vulnerable kernel version and potential for an attacker to interact with DMA operations.","blast_radius":"If exploited, the impact could be significant, potentially allowing an attacker to gain elevated privileges or cause system instability.","remediation":"Upgrade to the fixed version 5b138c534fda or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["kernel","memory","privilege-escalation"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-30T09:13:29.401Z"}}