{"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": "2026-08-17T05:07:56.806Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:07:56.806Z"}, "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", "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"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/xen/xen-scsiback.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4567ce79fe2f84c3dcc3a91b22a377cf482d33ad", "status": "affected", "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e", "versionType": "git"}, {"lessThan": "6c01f0439098f00a64b246dc27479602201382f7", "status": "affected", "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e", "versionType": "git"}, {"lessThan": "18d4f86816592586b38513543b5e1f9553bc271f", "status": "affected", "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e", "versionType": "git"}, {"lessThan": "fbc1bdede66d0f2cde83b75d6524ce1a815bb69f", "status": "affected", "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e", "versionType": "git"}, {"lessThan": "255fb7b0cdc947b1c01929c7f133281342a3a6b5", "status": "affected", "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e", "versionType": "git"}, {"lessThan": "1357fb32d42ad8da193e6da285f09e6452feabda", "status": "affected", "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e", "versionType": "git"}, {"lessThan": "66aefc277ebb796ec285d550305535dc3fc0179f", "status": "affected", "version": "2dbcdf33dbf61f44b29adb52338282c3d7840d0e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/xen/xen-scsiback.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"lessThan": "4.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-72086", "lastModified": "2026-08-17T06:18:07.513", "metrics": {}, "published": "2026-08-15T06:21:22.593", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1357fb32d42ad8da193e6da285f09e6452feabda"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18d4f86816592586b38513543b5e1f9553bc271f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/255fb7b0cdc947b1c01929c7f133281342a3a6b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4567ce79fe2f84c3dcc3a91b22a377cf482d33ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/66aefc277ebb796ec285d550305535dc3fc0179f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6c01f0439098f00a64b246dc27479602201382f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fbc1bdede66d0f2cde83b75d6524ce1a815bb69f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: scsi: xen: scsiback: Free the command tag on the TMR submit-failure path", "id": "2516331", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516331"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's `scsi: xen: scsiback` component. A pvSCSI guest can trigger a resource leak by issuing specific SCSI (Small Computer System Interface) requests when a task management operation fails. This vulnerability allows the guest to leak command tags associated with a Logical Unit Number (LUN) session, which can lead to a Denial of Service (DoS) by stopping the LUN."], "name": "CVE-2026-72086", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72086\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72086\nhttps://lore.kernel.org/linux-cve-announce/2026081522-CVE-2026-72086-b22d@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2dbcdf33dbf61f44b29adb52338282c3d7840d0e,4567ce79fe2f84c3dcc3a91b22a377cf482d33ad)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2dbcdf33dbf61f44b29adb52338282c3d7840d0e,6c01f0439098f00a64b246dc27479602201382f7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2dbcdf33dbf61f44b29adb52338282c3d7840d0e,18d4f86816592586b38513543b5e1f9553bc271f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2dbcdf33dbf61f44b29adb52338282c3d7840d0e,fbc1bdede66d0f2cde83b75d6524ce1a815bb69f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2dbcdf33dbf61f44b29adb52338282c3d7840d0e,255fb7b0cdc947b1c01929c7f133281342a3a6b5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2dbcdf33dbf61f44b29adb52338282c3d7840d0e,1357fb32d42ad8da193e6da285f09e6452feabda)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2dbcdf33dbf61f44b29adb52338282c3d7840d0e,66aefc277ebb796ec285d550305535dc3fc0179f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T08:30:06.147661+00:00", "updated": "2026-08-18T05:45:03.313401+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}