CVE-2024-26845

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

scsi: target: core: Add TMF to tmr_list handling

An abort that is responded to by iSCSI itself is added to tmr_list but does

not go to target core. A LUN_RESET that goes through tmr_list takes a

refcounter on the abort and waits for completion. However, the abort will

be never complete because it was not started in target core.

Unable to locate ITT: 0x05000000 on CID: 0

Unable to locate RefTaskTag: 0x05000000 on CID: 0.

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

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

...

INFO: task kworker/0:2:49 blocked for more than 491 seconds.

task:kworker/0:2 state:D stack: 0 pid: 49 ppid: 2 flags:0x00000800

Workqueue: events target_tmr_work [target_core_mod]

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References