{"id":"CVE-2026-90387","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nswiotlb: Preserve allocation virtual address for dynamic pools\n\nswiotlb_alloc_tlb() can allocate from the DMA atomic pool when a decrypted\npool is needed from atomic co…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nswiotlb: Preserve allocation virtual address for dynamic pools\n\nswiotlb_alloc_tlb() can allocate from the DMA atomic pool when a decrypted\npool is needed from atomic co…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 79636caad3618e2b38457f6e298c9b31ba82b489 < 68bf3ebd8e7020dae58e8aa14c7d482738bff9a8","Linux >= 79636caad3618e2b38457f6e298c9b31ba82b489 < 45507dcb0847e96add4455274b12df0eca6590b4","Linux >= 79636caad3618e2b38457f6e298c9b31ba82b489 < 35e0103177826430b5df888b1506239d41e76ab5","Linux >= 79636caad3618e2b38457f6e298c9b31ba82b489 < c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319","Linux >= 79636caad3618e2b38457f6e298c9b31ba82b489 < 57d29044d0f29a76c6ec0c112c8c7371d5608dc7","Linux 6.6"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:56.617","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90387","references":[{"url":"https://git.kernel.org/stable/c/35e0103177826430b5df888b1506239d41e76ab5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/45507dcb0847e96add4455274b12df0eca6590b4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/57d29044d0f29a76c6ec0c112c8c7371d5608dc7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/68bf3ebd8e7020dae58e8aa14c7d482738bff9a8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00163,"epssPercentile":0.05947,"ingestedAt":"2026-09-17T16:21:47.804Z","slug":"CVE-2026-90387","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nswiotlb: Preserve allocation virtual address for dynamic pools\n\nswiotlb_alloc_tlb() can allocate from the DMA atomic pool when a decrypted\npool is needed from atomic context. With CONFIG_DMA_DIRECT_REMAP, the\natomic pool is backed by remapped virtual addresses, which are not the same\nas the direct-map addresses returned by phys_to_virt().\n\nswiotlb_init_io_tlb_pool() currently reconstructs the pool virtual address\nfrom the physical start address. For atomic-pool backed allocations this\nstores the wrong address in pool->vaddr. Later, swiotlb_free_tlb() passes\nthat address to dma_free_from_pool(), which will fail to recognize the\nchunk\n\nPass the virtual address returned by the allocation path into\nswiotlb_init_io_tlb_pool(), and store that address in pool->vaddr. This\nkeeps the pool free path using the same virtual address as the allocator.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207291,"id":"CVE-2026-90387","ts":1789757340485,"field":"cvss","old":null,"new":"7.8"},{"seq":207290,"id":"CVE-2026-90387","ts":1789757340485,"field":"severity","old":"none","new":"high"}]}