{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.187-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.101-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.101-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  rhashtable: clear stale iter-\u003ep on table restart  rhashtable_walk_start_check() has two restart paths when resuming a walk. When iter-\u003ewalker.tbl is valid, it re-validates iter-\u003ep against the table and sets iter-\u003ep = NULL if the object is gone.  When iter-\u003ewalker.tbl is NULL (table was freed during resize), it resets slot and skip but forgets to clear iter-\u003ep.  rhashtable_walk_next() then dereferences the stale iter-\u003ep, reading freed memory.  This is a use-after-free.  Any caller that does multi-fragment rhashtable walks across walk_stop/walk_start boundaries is affected.  Concrete cases include netlink_diag (__netlink_diag_dump in net/netlink/diag.c) and TIPC (tipc_nl_sk_walk in net/tipc/socket.c).  Crash stack (netlink_diag):   BUG: KASAN: slab-use-after-free in rhashtable_walk_next+0x365/0x3c0   Read of size 8 at addr ffff88801a9d2438 (freed kmalloc-2k, offset 1080)   Call Trace:    rhashtable_walk_next+0x365/0x3c0 (lib/rhashtable.c:1016)    __netlink_diag_dump+0x160/0x760 (net/netlink/diag.c:122)    netlink_diag_dump+0xc2/0x240    netlink_dump+0x5bc/0x1270    netlink_recvmsg+0x7a3/0x980    sock_recvmsg+0x1bc/0x200    __sys_recvfrom+0x1d4/0x2c0",
  "id": "DEBIAN-CVE-2026-64563",
  "modified": "2026-09-14T16:47:49.299284977Z",
  "published": "2026-08-04T07:16:31.220Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64563"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-64563"
  ]
}