{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.180-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  net, bpf: check master for NULL in xdp_master_redirect()  xdp_master_redirect() dereferences the result of netdev_master_upper_dev_get_rcu() without a NULL check, but that helper returns NULL when the receiving device has no upper-master adjacency.  The reach guard only checks netif_is_bond_slave(). On bond slave release bond_upper_dev_unlink() drops the upper-master adjacency before clearing IFF_SLAVE, so an XDP_TX reaching xdp_master_redirect() in that window still passes netif_is_bond_slave() while master is already NULL, and faults on master-\u003eflags at offset 0xb0:    BUG: kernel NULL pointer dereference, address: 00000000000000b0   RIP: 0010:xdp_master_redirect (net/core/filter.c:4432)   Call Trace:    xdp_master_redirect (net/core/filter.c:4432)    bpf_prog_run_generic_xdp (include/net/xdp.h:700)    do_xdp_generic (net/core/dev.c:5608)    __netif_receive_skb_one_core (net/core/dev.c:6204)    process_backlog (net/core/dev.c:6319)    __napi_poll (net/core/dev.c:7729)    net_rx_action (net/core/dev.c:7792)    handle_softirqs (kernel/softirq.c:622)    __dev_queue_xmit (include/linux/bottom_half.h:33)    packet_sendmsg (net/packet/af_packet.c:3082)    __sys_sendto (net/socket.c:2252)   Kernel panic - not syncing: Fatal exception in interrupt  The missing check dates back to the original code; commit 1921f91298d1 (\"net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master\") later added the master-\u003eflags read where the fault now lands but kept the unconditional deref. Check master for NULL before use; a NULL master is treated the same as one that is not up.",
  "id": "DEBIAN-CVE-2026-64545",
  "modified": "2026-09-09T08:47:25.073057157Z",
  "published": "2026-07-27T21:17:07.130Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64545"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-64545"
  ]
}