{"id":"CVE-2026-74277","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74277","summary":"iommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path","details":"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`.","published":"2026-08-15T05:57:48.814Z","modified":"2026-08-18T03:56:45.833865073Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"7.1.5"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/8646f00ce021e49f4f05bc1d4060a0c27b25d0e1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/db50fb87015b955a5a0c155293b2dd40d63a3b9e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74277.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74277"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:45.833865073Z"}}