{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","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","source":"CNA: Linux","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"}]}],"cveId":"CVE-2026-72086","cwes":[],"description":"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.","epss":{"date":"2026-11-06","percentile":0.11438,"score":0.00211},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793985576650,"publishedAt":1786773154822,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4567ce79fe2f84c3dcc3a91b22a377cf482d33ad"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/6c01f0439098f00a64b246dc27479602201382f7"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/18d4f86816592586b38513543b5e1f9553bc271f"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/fbc1bdede66d0f2cde83b75d6524ce1a815bb69f"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/255fb7b0cdc947b1c01929c7f133281342a3a6b5"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/1357fb32d42ad8da193e6da285f09e6452feabda"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/66aefc277ebb796ec285d550305535dc3fc0179f"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/1357fb32d42ad8da193e6da285f09e6452feabda"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/18d4f86816592586b38513543b5e1f9553bc271f"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/255fb7b0cdc947b1c01929c7f133281342a3a6b5"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/4567ce79fe2f84c3dcc3a91b22a377cf482d33ad"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/66aefc277ebb796ec285d550305535dc3fc0179f"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/6c01f0439098f00a64b246dc27479602201382f7"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/fbc1bdede66d0f2cde83b75d6524ce1a815bb69f"}],"remediation":[],"revision":"b010ebc6f844b07c6eb300c2fb726cc6dc4c48772f415b0bf50d55c356f80a25","sources":[{"modifiedAt":1793984119691,"name":"CNA: Linux","retrievedAt":1793986035662,"url":"https://www.cve.org/CVERecord?id=CVE-2026-72086"},{"modifiedAt":1793985576650,"name":"NVD","retrievedAt":1793989684137,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72086"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793986081749,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-72086"}],"ssvc":{"assessedAt":1793983880477,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"scsi: xen: scsiback: Free the command tag on the TMR submit-failure path","updatedAt":1793989684137}