{"id":"CVE-2026-98242","published":"2026-10-06T09:18:12.253","lastModified":"2026-10-06T09:18:12.253","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndma-buf: Fix silent overflow for phys vec to sgt\n\nIn case MMIO size is bigger than 4G and peer2peer DMA goes\nthrough host bridge, we trigger a code path that assigns the\ntotal linked IOVA (which is greater than 4G) to mapped_len.\n\nPreviously, `mapped_len` was declared as 32-bit `unsigned int`.\nWhen accumulating `size_t` lengths, this leads to a silent wrap-around.\nThis truncation causes truncated lengths to be passed to functions\nlike `fill_sg_entry()`.\n\nFix this by changing `mapped_len` to `size_t` (64-bit). While\nat it, fix similar potential overflow issues in `calc_sg_nents`\nby using `check_add_overflow()` for `nents` and using\n`unsigned int` for the loop iterator in `fill_sg_entry` to match.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/6b98fd7106d4e486f432664893dcd4d6fa3a9693","tags":[]},{"url":"https://git.kernel.org/stable/c/b344ca94e8cc85796f16ea25e2e5a8e0303fe813","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}