In the Linux kernel, the following vulnerability has been resolved:
scsi: target: iscsit: Free cmds before session free
Commands from recovery entries are freed after session has been closed. That leads to use-after-free at command free or NPE with such call trace:
Time2Retain timer expired for SID: 1, cleaning up iSCSI session. BUG: kernel NULL pointer dereference, address: 0000000000000140 RIP: 0010:sbitmap_queue_clear+0x3a/0xa0 Call Trace: target_release_cmd_kref+0xd1/0x1f0 [target_core_mod] transport_generic_free_cmd+0xd1/0x180 [target_core_mod] iscsit_free_cmd+0x53/0xd0 [iscsi_target_mod] iscsit_free_connection_recovery_entries+0x29d/0x320 [iscsi_target_mod] iscsit_close_session+0x13a/0x140 [iscsi_target_mod] iscsit_check_post_dataout+0x440/0x440 [iscsi_target_mod] call_timer_fn+0x24/0x140
Move cleanup of recovery enrties to before session freeing.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/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 python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernel-headersUpgrade kernel-livepatch-5.10.184-174.730Upgrade perfUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfo-common-x86_64Upgrade python-perfUpgrade kernel-tools-develUpgrade kernel-toolsUpgrade kernel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-libbpf-develUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-staticUpgrade kernel-libbpfUpgrade kernel-livepatch-6.1.34-56.100Upgrade kernel-headersUpgrade kernelUpgrade bpftool-debuginfoUpgrade kernel-tools-develUpgrade python3-perfUpgrade perfUpgrade python3-perf-debuginfoUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade perf-debuginfo | Feb 20, 2026 | Dec 30, 2025 |
| Debian | — | Upgrade linux | Dec 31, 2025 | Dec 31, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 30, 2025 |
| Ubuntu | — | Upgrade linux-iotUpgrade linux-ibm-5.4Upgrade linux-bluefieldUpgrade linux-gcp-fipsUpgrade linux-azure-fdeUpgrade linux-hwe-5.4Upgrade linux-hwe-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-azure-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-azureUpgrade linuxUpgrade linux-raspi-5.4Upgrade linux-nvidia-tegra-igxUpgrade linux-awsUpgrade linux-nvidia-tegra-5.15Upgrade linux-gcp-5.4Upgrade linux-nvidia-tegraUpgrade linux-raspiUpgrade linux-oracle-5.15Upgrade linux-ibmUpgrade linux-gkeUpgrade linux-ibm-5.15Upgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-azure-fipsUpgrade linux-aws-5.4Upgrade linux-gcpUpgrade linux-aws-fipsUpgrade linux-nvidiaUpgrade linux-riscv-5.15Upgrade linux-azure-5.15Upgrade linux-oracle-5.4Upgrade linux-intel-iotg-5.15Upgrade linux-gkeopUpgrade linux-realtimeUpgrade linux-oracleUpgrade linux-fipsUpgrade linux-intel-iotgUpgrade linux-lowlatencyUpgrade linux-aws-5.15Upgrade linux-xilinx-zynqmp | Jan 6, 2026 | Jan 2, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 30, 2025 |
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