{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.94-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF  macvlan_get_size() does not account for IFLA_MACVLAN_BC_CUTOFF, but macvlan_fill_info() conditionally includes it when port-\u003ebc_cutoff != 1. This causes nla_put_s32() to fail with -EMSGSIZE when the netlink skb runs out of space, triggering a WARN_ON in rtnetlink and preventing the interface from being dumped.  The bug can be reproduced with:    ip link add macvlan0 link eth0 type macvlan mode bridge   ip link set macvlan0 type macvlan bc_cutoff 0   ip -d link show macvlan0   # fails with -EMSGSIZE  The bc_cutoff feature was added in commit 954d1fa1ac93 (\"macvlan: Add netlink attribute for broadcast cutoff\"), which added the nla_put_s32() call in macvlan_fill_info() but missed adding the corresponding nla_total_size(4) in macvlan_get_size(). A follow-up commit 55cef78c244d (\"macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF\") fixed the missing nla_policy entry but still did not fix the size calculation.",
  "id": "DEBIAN-CVE-2026-53013",
  "modified": "2026-09-14T16:47:43.391914824Z",
  "published": "2026-06-24T17:17:12.570Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-53013"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-53013"
  ]
}