{"id":"CVE-2026-90387","revision":"eb8e895aaaa94cea9151fbaadb50eb3a","records":[{"revision":"eb8e895aaaa94cea9151fbaadb50eb3a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90387","aliases":[],"title":"swiotlb: Preserve allocation virtual address for dynamic pools","description":"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.","state":0,"publishedAt":"2026-09-17T16:09:22.493+00:00","modifiedAt":"2026-10-19T09:02:50.001+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/dma/swiotlb.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"79636caad3618e2b38457f6e298c9b31ba82b489\",\n                            \"lessThan\": \"68bf3ebd8e7020dae58e8aa14c7d482738bff9a8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"79636caad3618e2b38457f6e298c9b31ba82b489\",\n                            \"lessThan\": \"45507dcb0847e96add4455274b12df0eca6590b4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"79636caad3618e2b38457f6e298c9b31ba82b489\",\n                            \"lessThan\": \"35e0103177826430b5df888b1506239d41e76ab5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"79636caad3618e2b38457f6e298c9b31ba82b489\",\n                            \"lessThan\": \"c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"79636caad3618e2b38457f6e298c9b31ba82b489\",\n                            \"lessThan\": \"57d29044d0f29a76c6ec0c112c8c7371d5608dc7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/dma/swiotlb.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/68bf3ebd8e7020dae58e8aa14c7d482738bff9a8","https://git.kernel.org/stable/c/45507dcb0847e96add4455274b12df0eca6590b4","https://git.kernel.org/stable/c/35e0103177826430b5df888b1506239d41e76ab5","https://git.kernel.org/stable/c/c1f4d7763cdf1b9e0d35c14aa6f52d0512a36319","https://git.kernel.org/stable/c/57d29044d0f29a76c6ec0c112c8c7371d5608dc7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90387","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90387","identifiers":["CVE-2026-90387"]},"retained":false,"historicalAffected":[]}],"coverage":[]}