{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e"
            },
            {
              "fixed": "4567ce79fe2f84c3dcc3a91b22a377cf482d33ad"
            },
            {
              "fixed": "6c01f0439098f00a64b246dc27479602201382f7"
            },
            {
              "fixed": "18d4f86816592586b38513543b5e1f9553bc271f"
            },
            {
              "fixed": "fbc1bdede66d0f2cde83b75d6524ce1a815bb69f"
            },
            {
              "fixed": "255fb7b0cdc947b1c01929c7f133281342a3a6b5"
            },
            {
              "fixed": "1357fb32d42ad8da193e6da285f09e6452feabda"
            },
            {
              "fixed": "66aefc277ebb796ec285d550305535dc3fc0179f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.6.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72086.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: xen: scsiback: Free the command tag on the TMR submit-failure path\n\nscsiback_device_action() obtains a command tag in\nscsiback_get_pend_req() and submits a task-management request with\ntarget_submit_tmr(). When target_submit_tmr() fails it returns \u003c 0 and\nscsiback jumps to the err: label, which sends a response but frees\nnothing, leaking the tag.\n\nImpact: a pvSCSI guest can leak the command tags of a LUN's session,\nstopping the LUN, by issuing VSCSIIF_ACT_SCSI_ABORT or RESET requests\nwhenever target_submit_tmr() fails.\n\ntransport_generic_free_cmd() cannot be used here. By the time\ntarget_submit_tmr() returns an error it has already run\n__target_init_cmd() (so se_cmd-\u003ecmd_kref is one, not zero), and on its\ntarget_get_sess_cmd() error path it has freed se_cmd-\u003ese_tmr_req via\ncore_tmr_release_req() while leaving SCF_SCSI_TMR_CDB set and the\npointer dangling. Letting the command release run target_free_cmd_mem()\nwould then double-free se_tmr_req.\n\nUse the same helper, which returns just the tag, on this path too.",
  "id": "CVE-2026-72086",
  "modified": "2026-08-18T03:31:01.582675446Z",
  "published": "2026-08-15T05:52:34.822Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1357fb32d42ad8da193e6da285f09e6452feabda"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/18d4f86816592586b38513543b5e1f9553bc271f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/255fb7b0cdc947b1c01929c7f133281342a3a6b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4567ce79fe2f84c3dcc3a91b22a377cf482d33ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66aefc277ebb796ec285d550305535dc3fc0179f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c01f0439098f00a64b246dc27479602201382f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fbc1bdede66d0f2cde83b75d6524ce1a815bb69f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72086.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72086"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "scsi: xen: scsiback: Free the command tag on the TMR submit-failure path"
}