{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.12-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  net: devmem: reject dma-buf bind with non-page-aligned size or SG length  net_devmem_bind_dmabuf() trusts dmabuf-\u003esize and sg_dma_len() to be PAGE_SIZE multiples without checking:    - tx_vec is sized dmabuf-\u003esize / PAGE_SIZE, and     net_devmem_get_niov_at() only bounds-checks virt_addr \u003c dmabuf-\u003esize     before indexing tx_vec[virt_addr / PAGE_SIZE]. With size =     N*PAGE_SIZE + r (1 \u003c= r \u003c PAGE_SIZE), sendmsg() at iov_base =     N*PAGE_SIZE passes the bound check and reads tx_vec[N] -- one past.    - owner-\u003earea.num_niovs = len / PAGE_SIZE while gen_pool_add_owner()     covers the full byte len, so a non-page-multiple non-final sg     desyncs num_niovs from the gen_pool region for every later sg, on     both RX and TX.  dma-buf does not require page-aligned sizes, so the bind path has to enforce what its own indexing assumes. Reject both with -EINVAL.  The size check is TX-only (only tx_vec is sized off dmabuf-\u003esize); the SG-length check covers both directions.",
  "id": "DEBIAN-CVE-2026-64124",
  "modified": "2026-09-14T16:47:42.005037229Z",
  "published": "2026-07-19T16:17:54.030Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64124"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-64124"
  ]
}