{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d021c344051af91f42c5ba9fdedc176740cbd238"
            },
            {
              "fixed": "1e19f08552b90070ed18bafb1763c78297823af6"
            },
            {
              "fixed": "1dd531e28f61edd286edc486ab068f135b5ae1eb"
            },
            {
              "fixed": "ecda37f8faab3220da199335e42564cb7a9ad145"
            },
            {
              "fixed": "cc27e989a5dfdfcfc1cca7c3be27a0c7532b46cb"
            },
            {
              "fixed": "47e63077605c6c2aa45b3df9847a8cdc1f1f6ef9"
            },
            {
              "fixed": "440447699c681e26ed58e9c309cad718270a18b4"
            },
            {
              "fixed": "9fe74e42914c851d68069713b7b917a9c33faf26"
            },
            {
              "fixed": "99e22ddf4edb63dc8382bc028af928056d3450cf"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.9.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.142"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64115.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/vmci: fix UAF when peer resets connection during handshake\n\nvmci_transport_recv_connecting_server() returned err = 0 for a peer\nRST in its default switch arm:\n\n\terr = pkt-\u003etype == VMCI_TRANSPORT_PACKET_TYPE_RST ? 0 : -EINVAL;\n\nThat made vmci_transport_recv_listen() skip vsock_remove_pending(),\nleaving the pending socket on the listener's pending_links with\nsk_state = TCP_CLOSE while destroy: still dropped the explicit\nreference taken before schedule_delayed_work().\n\nOne second later vsock_pending_work() observed is_pending=true and\nperformed full cleanup: vsock_remove_pending() then the two trailing\nsock_put(sk) calls -- the first reached refcount 0 and __sk_freed\nthe socket, and the second wrote into the freed object:\n\n  BUG: KASAN: slab-use-after-free in refcount_warn_saturate\n  Write of size 4 at addr ffff88800b1cac80 by task kworker\n  Workqueue: events vsock_pending_work\n\nTreat peer RST like any other unexpected packet type (err = -EINVAL).\nAll destroy: arms now return err \u003c 0, so vmci_transport_recv_listen()\nremoves pending from pending_links synchronously and\nvsock_pending_work() takes the is_pending=false / !rejected branch,\ndropping only its own work reference.  This also closes the\nmulti-packet race Sashiko reported on v2: pending is removed from\nthe list before any subsequent packet can find it.\n\nThe pre-existing sk_acceptq_removed() gap on the err \u003c 0 path of\nvmci_transport_recv_listen() that Sashiko also noted is not\nintroduced or changed by this patch.\n\nTested on lts-6.12.79 with KASAN: 52/100 unpatched -\u003e 0/100 patched.",
  "id": "CVE-2026-64115",
  "modified": "2026-07-22T05:29:51.923716788Z",
  "published": "2026-07-19T15:40:15.513Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1dd531e28f61edd286edc486ab068f135b5ae1eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e19f08552b90070ed18bafb1763c78297823af6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/440447699c681e26ed58e9c309cad718270a18b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47e63077605c6c2aa45b3df9847a8cdc1f1f6ef9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99e22ddf4edb63dc8382bc028af928056d3450cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9fe74e42914c851d68069713b7b917a9c33faf26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc27e989a5dfdfcfc1cca7c3be27a0c7532b46cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ecda37f8faab3220da199335e42564cb7a9ad145"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64115.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64115"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vsock/vmci: fix UAF when peer resets connection during handshake"
}