In the Linux kernel, the following vulnerability has been resolved:
scsi: target: Fix multiple LUN_RESET handling
This fixes a bug where an initiator thinks a LUN_RESET has cleaned up running commands when it hasn't. The bug was added in commit 51ec502a3266 ("target: Delete tmr from list before processing").
The problem occurs when:
1. We have N I/O cmds running in the target layer spread over 2 sessions.
2. The initiator sends a LUN_RESET for each session.
3. session1's LUN_RESET loops over all the running commands from both sessions and moves them to its local drain_task_list.
4. session2's LUN_RESET does not see the LUN_RESET from session1 because the commit above has it remove itself. session2 also does not see any commands since the other reset moved them off the state lists.
5. sessions2's LUN_RESET will then complete with a successful response.
6. sessions2's inititor believes the running commands on its session are now cleaned up due to the successful response and cleans up the running commands from its side. It then restarts them.
7. The commands do eventually complete on the backend and the target starts to return aborted task statuses for them. The initiator will either throw a invalid ITT error or might accidentally lookup a new task if the ITT has been reallocated already.
Fix the bug by reverting the patch, and serialize the execution of LUN_RESETs and Preempt and Aborts.
Also prevent us from waiting on LUN_RESETs in core_tmr_drain_tmr_list, because it turns out the original patch fixed a bug that was not mentioned. For LUN_RESET1 core_tmr_drain_tmr_list can see a second LUN_RESET and wait on it. Then the second reset will run core_tmr_drain_tmr_list and see the first reset and wait on it resulting in a deadlock.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.10.184-174.730Upgrade kernelUpgrade kernel-toolsUpgrade kernel-tools-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade python-perfUpgrade perfUpgrade kernel-tools-develUpgrade perf-debuginfoUpgrade kernel-livepatch-5.15.117-72.142Upgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfo | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernelUpgrade python3-perf-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-livepatch-6.1.29-47.49Upgrade kernel-libbpf-develUpgrade kernel-toolsUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade python3-perfUpgrade perfUpgrade kernel-develUpgrade kernel-libbpfUpgrade bpftoolUpgrade perf-debuginfoUpgrade kernel-debuginfo | Oct 24, 2025 | Oct 4, 2025 |
| Debian | — | Upgrade linux | Oct 6, 2025 | Oct 6, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perfUpgrade kernel-abi-stablelists | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade python3-perfUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rtNo solution exists | Nov 14, 2025 | Oct 4, 2025 |
| Ubuntu | — | Upgrade linux-nvidiaUpgrade linux-azure-5.15Upgrade linux-intel-iotgUpgrade linux-ibmUpgrade linux-gcpUpgrade linux-gkeopUpgrade linux-gcp-5.15Upgrade linux-kvmUpgrade linux-oracleUpgrade linux-gkeUpgrade linux-intel-iotg-5.15Upgrade linux-lowlatencyUpgrade linux-raspiUpgrade linux-xilinx-zynqmpUpgrade linux-realtimeUpgrade linux-riscv-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-intel-iot-realtimeUpgrade linux-oracle-5.15Upgrade linux-ibm-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-awsUpgrade linux-azureUpgrade linux-bluefieldUpgrade linux-aws-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-nvidia-tegraUpgrade linux-hwe-5.15Upgrade linux | Oct 10, 2025 | Oct 4, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 4, 2025 |
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