{"id":"CVE-2026-74277","revision":"90c658e1fde6430c9aad07ecc0edde90","records":[{"revision":"90c658e1fde6430c9aad07ecc0edde90","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74277","aliases":[],"title":"iommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path\n\nIn iommu_dma_map_sg(), when handling PCI P2PDMA cases, the DMA length\nof the current scatterlist segment `s` is incorrectly assigned from the\nhead entry `sg->length` instead of the current entry `s->length`.\n\nThis typo causes all P2PDMA segments in the scatterlist to inherit the\nlength of the first segment, leading to corrupted DMA lengths for multi-\nsegment scatterlists.\n\nFix this by using `s->length` instead of `sg->length`.","state":0,"publishedAt":"2026-08-15T05:57:48.814+00:00","modifiedAt":"2026-10-16T18:55:29.456+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                        \"drivers/iommu/dma-iommu.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a25e7962db0d79882c9d32fd2a67a02e79129c0e\",\n                            \"lessThan\": \"6166cb1344f16dd403f2192f4bea6f6654f1ae1e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a25e7962db0d79882c9d32fd2a67a02e79129c0e\",\n                            \"lessThan\": \"8646f00ce021e49f4f05bc1d4060a0c27b25d0e1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a25e7962db0d79882c9d32fd2a67a02e79129c0e\",\n                            \"lessThan\": \"db50fb87015b955a5a0c155293b2dd40d63a3b9e\",\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                        \"drivers/iommu/dma-iommu.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\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:C/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/6166cb1344f16dd403f2192f4bea6f6654f1ae1e","https://git.kernel.org/stable/c/8646f00ce021e49f4f05bc1d4060a0c27b25d0e1","https://git.kernel.org/stable/c/db50fb87015b955a5a0c155293b2dd40d63a3b9e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74277","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74277","identifiers":["CVE-2026-74277"]},"retained":false,"historicalAffected":[]}],"coverage":[]}