{"id":"CVE-2026-90387","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-90387","summary":"swiotlb: Preserve allocation virtual address for dynamic pools","details":"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 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.","published":"2026-09-17T16:09:22.493Z","modified":"2026-09-19T03:47:26.085444620Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.157"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/35e0103177826430b5df888b1506239d41e76ab5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/45507dcb0847e96add4455274b12df0eca6590b4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/57d29044d0f29a76c6ec0c112c8c7371d5608dc7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68bf3ebd8e7020dae58e8aa14c7d482738bff9a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90387.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90387"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:47:26.085444620Z"}}