{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72086",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.905Z",
        "datePublished": "2026-08-15T05:52:34.822Z",
        "dateUpdated": "2026-08-15T05:52:34.822Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-15T05:52:34.822Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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 < 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->cmd_kref is one, not zero), and on its\ntarget_get_sess_cmd() error path it has freed se_cmd->se_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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/xen/xen-scsiback.c"
                    ],
                    "versions": [
                        {
                            "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e",
                            "lessThan": "4567ce79fe2f84c3dcc3a91b22a377cf482d33ad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e",
                            "lessThan": "6c01f0439098f00a64b246dc27479602201382f7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e",
                            "lessThan": "18d4f86816592586b38513543b5e1f9553bc271f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e",
                            "lessThan": "fbc1bdede66d0f2cde83b75d6524ce1a815bb69f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e",
                            "lessThan": "255fb7b0cdc947b1c01929c7f133281342a3a6b5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e",
                            "lessThan": "1357fb32d42ad8da193e6da285f09e6452feabda",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e",
                            "lessThan": "66aefc277ebb796ec285d550305535dc3fc0179f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/xen/xen-scsiback.c"
                    ],
                    "versions": [
                        {
                            "version": "4.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.212",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2-rc4",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "5.15.212"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.1.178"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.12.97"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.6",
                                    "versionEndExcluding": "7.2-rc4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4567ce79fe2f84c3dcc3a91b22a377cf482d33ad"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6c01f0439098f00a64b246dc27479602201382f7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/18d4f86816592586b38513543b5e1f9553bc271f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fbc1bdede66d0f2cde83b75d6524ce1a815bb69f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/255fb7b0cdc947b1c01929c7f133281342a3a6b5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1357fb32d42ad8da193e6da285f09e6452feabda"
                },
                {
                    "url": "https://git.kernel.org/stable/c/66aefc277ebb796ec285d550305535dc3fc0179f"
                }
            ],
            "title": "scsi: xen: scsiback: Free the command tag on the TMR submit-failure path",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}