{
  "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": "6.12.105-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.8-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.107-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  net: pktgen: fix proc entry use-after-free  pktgen_change_name() replaces pkt_dev-\u003eentry while holding t-\u003eif_lock. pktgen_remove_device() removes the same entry before _rem_dev_from_if_list() takes that lock.  This allows the following interleaving:    CPU 0 (NETDEV_CHANGENAME)       CPU 1 (kpktgend)   if_lock(t)   proc_remove(pkt_dev-\u003eentry)                                   proc_remove(pkt_dev-\u003eentry)   pkt_dev-\u003eentry = proc_create_data(...)   if_unlock(t)  The kthread can pass the stale proc_dir_entry to proc_remove() after the rename path has freed it. A reproducer with a widened race window reports:    BUG: KASAN: slab-use-after-free in proc_remove+0x78/0x80   Read of size 8 at addr ffff8881478fea70 by task kpktgend_0/67   Call Trace:    proc_remove+0x78/0x80    pktgen_remove_device.isra.0+0x11c/0x4c0    pktgen_thread_worker+0x1214/0x6bc0    kthread+0x2c6/0x3b0   Allocated by task 95:    __proc_create+0x204/0x790    proc_create_data+0x72/0xe0    pktgen_thread_write+0xd61/0x1510   Freed by task 28:    kmem_cache_free+0xcb/0x3d0    proc_free_inode+0x5b/0x80    rcu_core+0x50a/0x1850   The buggy address belongs to the object at ffff8881478fea00    which belongs to the cache proc_dir_entry of size 192  Move proc_remove() into the if_lock-protected list removal helper. Keep it before list_del_rcu() to preserve the ordering required by add_device(). The rename path must then finish replacing the entry before removal, or it observes that the device is no longer on the list.",
  "id": "DEBIAN-CVE-2026-74479",
  "modified": "2026-09-19T21:47:30.316462554Z",
  "published": "2026-08-15T13:17:52.713Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-74479"
    }
  ],
  "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-2026-74479"
  ]
}