349 lines
18 KiB
JSON
349 lines
18 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-26845",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-02-19T14:20:24.182Z",
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"datePublished": "2024-04-17T10:10:09.337Z",
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"dateUpdated": "2026-08-05T11:27:45.996Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:27:45.996Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: core: Add TMF to tmr_list handling\n\nAn abort that is responded to by iSCSI itself is added to tmr_list but does\nnot go to target core. A LUN_RESET that goes through tmr_list takes a\nrefcounter on the abort and waits for completion. However, the abort will\nbe never complete because it was not started in target core.\n\n Unable to locate ITT: 0x05000000 on CID: 0\n Unable to locate RefTaskTag: 0x05000000 on CID: 0.\n wait_for_tasks: Stopping tmf LUN_RESET with tag 0x0 ref_task_tag 0x0 i_state 34 t_state ISTATE_PROCESSING refcnt 2 transport_state active,stop,fabric_stop\n wait for tasks: tmf LUN_RESET with tag 0x0 ref_task_tag 0x0 i_state 34 t_state ISTATE_PROCESSING refcnt 2 transport_state active,stop,fabric_stop\n...\n INFO: task kworker/0:2:49 blocked for more than 491 seconds.\n task:kworker/0:2 state:D stack: 0 pid: 49 ppid: 2 flags:0x00000800\n Workqueue: events target_tmr_work [target_core_mod]\nCall Trace:\n __switch_to+0x2c4/0x470\n _schedule+0x314/0x1730\n schedule+0x64/0x130\n schedule_timeout+0x168/0x430\n wait_for_completion+0x140/0x270\n target_put_cmd_and_wait+0x64/0xb0 [target_core_mod]\n core_tmr_lun_reset+0x30/0xa0 [target_core_mod]\n target_tmr_work+0xc8/0x1b0 [target_core_mod]\n process_one_work+0x2d4/0x5d0\n worker_thread+0x78/0x6c0\n\nTo fix this, only add abort to tmr_list if it will be handled by target\ncore."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable code is reached by iSCSI Task Management Function PDUs processed by the in-kernel LIO iSCSI target listening on TCP/3260, so a remote peer anywhere on the routable network can drive it. The same path is exported to other network fabrics (isert/RDMA, cxgbit).\nAC:L - The attacker fully controls both halves: an ABORT_TASK with a bogus RefTaskTag and out-of-window RefCmdSN parks a stale entry on dev_tmr_list, and an immediate-flagged LUN_RESET (which bypasses CmdSN sequencing) then walks that list. Using an out-of-order CmdSN keeps the stale entry alive indefinitely, so no race window has to be won.\nPR:N - Only an iSCSI session in full-feature phase is needed, and iSCSI login is unauthenticated in the standard SAN deployment (CHAP disabled, or generate_node_acls=1 demo mode) where the only \"credential\" is a plaintext IQN string that is discoverable via SendTargets and trivially spoofed.\nUI:N - The attacker sends two TMF PDUs on their own connection; no action by any administrator, initiator host, or local user is required.\nS:U - The deadlock is confined to the kernel's own target-core subsystem and its worker threads, with no crossing into a different security authority such as a hypervisor or IOMMU boundary.\nC:N - The defect is an unbalanced completion wait on a TMR that never entered target core; no memory is read out of bounds and no kernel data is disclosed to the initiator.\nI:N - Nothing is written out of bounds and no freed object is reused — the reference count is held too long rather than dropped too early, so there is no corruption or control-flow primitive.\nA:H - The target_tmr_work kworker blocks forever in target_put_cmd_and_wait() and the iSCSI thread loops indefinitely in __transport_wait_for_tasks(), leaving unkillable D-state threads, a permanently pinned lun_ref that prevents LUN/device teardown, and a wedged storage target that only a reboot recovers; the hung-task detector can also panic the box."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/target/target_core_device.c",
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"drivers/target/target_core_transport.c"
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],
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"versions": [
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{
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"version": "2281c95fe751325874d135b237ecdcd3bc34cc26",
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"lessThan": "11f3fe5001ed05721e641f0ecaa7a73b7deb245d",
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"status": "affected",
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/target/target_core_device.c",
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"drivers/target/target_core_transport.c"
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],
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"versions": [
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{
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"version": "5.1",
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"version": "0",
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},
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"version": "5.4.270",
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"lessThanOrEqual": "5.4.*",
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},
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{
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"version": "5.10.211",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.15.150",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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"version": "6.1.80",
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"status": "unaffected",
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"version": "6.6.19",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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"version": "6.7.7",
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"lessThanOrEqual": "6.7.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.8",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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],
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"title": "scsi: target: core: Add TMF to tmr_list handling",
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