In the Linux kernel, the following vulnerability has been resolved:
ublk: make sure ubq->canceling is set when queue is frozen
Now ublk driver depends on `ubq->canceling` for deciding if the request can be dispatched via uring_cmd & io_uring_cmd_complete_in_task().
Once ubq->canceling is set, the uring_cmd can be done via ublk_cancel_cmd() and io_uring_cmd_done().
So set ubq->canceling when queue is frozen, this way makes sure that the flag can be observed from ublk_queue_rq() reliably, and avoids use-after-free on uring_cmd.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade kernel | Sep 22, 2025 | Apr 16, 2025 |
| Redhat_linux | — | Upgrade kernel-rtUpgrade kernel | Dec 2, 2025 | Apr 16, 2025 |
| Rocky_linux | — | Upgrade kernel-rt-debug-modulesUpgrade kernel-debug-uki-virtUpgrade kernel-debug-develUpgrade kernel-modules-extra-matchedUpgrade kernel-zfcpdumpUpgrade kernel-rt-debugUpgrade rtlaUpgrade kernel-modules-extraUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-modules-extraUpgrade kernel-rt-develUpgrade kernel-rt-debug-debuginfoUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-debuginfoUpgrade kernel-debug-modules-coreUpgrade kernel-coreUpgrade kernel-rt-coreUpgrade kernelUpgrade python3-perf-debuginfoUpgrade kernel-debug-debuginfoUpgrade kernel-debug-modules-extraUpgrade rvUpgrade kernel-toolsUpgrade kernel-rt-modules-coreUpgrade kernel-rt-debug-coreUpgrade kernel-develUpgrade kernel-debug-modulesUpgrade kernel-debugUpgrade kernel-tools-libsUpgrade kernel-debug-coreUpgrade kernel-rt-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-zfcpdump-devel-matchedUpgrade kernel-tools-debuginfoUpgrade kernel-tools-libs-develUpgrade kernel-modules-coreUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-rt-modulesUpgrade perf-debuginfoUpgrade kernel-rt-debug-develUpgrade kernel-uki-virtUpgrade kernel-zfcpdump-develUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-debug-modules-coreUpgrade kernel-debug-devel-matchedUpgrade kernel-uki-virt-addonsUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-devel-matchedUpgrade kernel-modulesUpgrade kernel-zfcpdump-coreUpgrade libperf-debuginfoUpgrade kernel-debuginfo-common-s390xUpgrade libperfUpgrade kernel-rtUpgrade python3-perfUpgrade perf | Feb 5, 2026 | Dec 5, 2025 |
| Suse | — | Upgrade kernel-default-extraUpgrade kernel-zfcpdumpUpgrade kernel-kvmsmallUpgrade kernel-kvmsmall-develUpgrade kernel-default-livepatchUpgrade kernel-macrosUpgrade kernel-source-azureUpgrade kernel-azure-vdsoUpgrade kernel-default-vdsoUpgrade kernel-obs-qaUpgrade kernel-symsUpgrade kernel-default-develUpgrade kernel-64kbUpgrade kernel-azure-develUpgrade kernel-devel-azureUpgrade kernel-docs-htmlUpgrade kernel-64kb-develUpgrade kernel-azure-extraUpgrade kernel-sourceUpgrade kernel-64kb-extraUpgrade kernel-kvmsmall-vdsoUpgrade kernel-docsUpgrade kernel-defaultUpgrade kernel-develUpgrade kernel-source-vanillaUpgrade kernel-azure | Dec 5, 2025 | Dec 5, 2025 |
| Ubuntu | — | Upgrade linux-image-6.11.0-1015-awsUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-virtualUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1041-nvidia-64kUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-6.14.0-1007-azure-fdeUpgrade linux-image-6.11.0-28-generic-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-6.14.0-1007-oracleUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.14.0-1007-oracle-64kUpgrade linux-image-6.14.0-22-genericUpgrade linux-image-6.8.0-1038-oracleUpgrade linux-image-aws-64kUpgrade linux-image-awsUpgrade linux-image-6.8.0-1029-azure-nvidiaUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-realtimeUpgrade linux-image-6.11.0-1015-lowlatencyUpgrade linux-image-azure-6.11Upgrade linux-image-oem-24.04bUpgrade linux-image-generic-64k-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-6.11.0-28-genericUpgrade linux-image-generic-lpaeUpgrade linux-image-gkeop-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-86-lowlatencyUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-86-generic-64kUpgrade linux-image-oem-22.04Upgrade linux-image-6.11.0-1011-realtimeUpgrade linux-image-lowlatency-6.11Upgrade linux-image-6.11.0-1015-lowlatency-64kUpgrade linux-image-ibmUpgrade linux-image-6.8.0-86-genericUpgrade linux-image-azure-6.8Upgrade linux-image-gkeUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.11.0-1018-azureUpgrade linux-image-lowlatency-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.14.0-1004-realtimeUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1044-azure-fipsUpgrade linux-image-gcp-6.8Upgrade linux-image-6.14.0-22-generic-64kUpgrade linux-image-6.8.0-1038-gke-64kUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1041-raspiUpgrade linux-image-azure-nvidia-6.8Upgrade linux-image-6.11.0-1024-oemUpgrade linux-image-nvidia-64kUpgrade linux-image-genericUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1041-azureUpgrade linux-image-6.8.0-1041-awsUpgrade linux-image-6.8.0-1025-gkeopUpgrade linux-image-6.8.0-1041-aws-64kUpgrade linux-image-6.8.0-1041-nvidia-lowlatency-64kUpgrade linux-image-aws-64k-6.8Upgrade linux-image-azure-nvidia-lts-24.04Upgrade linux-image-raspi-6.8Upgrade linux-image-6.14.0-1008-gcp-64kUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-oracle-6.8Upgrade linux-image-gkeopUpgrade linux-image-gke-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-azure-fde-edgeUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.1-1036-realtimeUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-lowlatency-64k-6.11Upgrade linux-image-azure-fde-6.11Upgrade linux-image-6.14.0-1008-gcpUpgrade linux-image-6.14.0-1007-aws-64kUpgrade linux-image-6.11.0-1017-oracleUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-gcpUpgrade linux-image-azureUpgrade linux-image-6.8.0-86-lowlatency-64kUpgrade linux-image-6.14.0-1007-awsUpgrade linux-image-kvmUpgrade linux-image-6.8.0-1042-gcp-64kUpgrade linux-image-6.11.0-1016-gcpUpgrade linux-image-oem-22.04bUpgrade linux-image-6.11.0-1017-oracle-64kUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-6.14.0-1007-raspiUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-azure-fdeUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1038-oracle-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-6.14.0-1007-azureUpgrade linux-image-aws-6.8Upgrade linux-image-6.8.0-2032-raspi-realtimeUpgrade linux-image-6.11.0-1018-azure-fdeUpgrade linux-image-gke-6.8Upgrade linux-image-6.11.0-1016-gcp-64kUpgrade linux-image-6.11.0-1014-raspiUpgrade linux-image-6.8.0-1042-gcpUpgrade linux-image-azure-fips-6.8Upgrade linux-image-6.8.0-1038-gkeUpgrade linux-image-6.8.0-1039-ibmUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-raspiUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-nvidiaUpgrade linux-image-gke-64k-6.8Upgrade linux-image-6.8.0-1041-nvidia-lowlatencyUpgrade linux-image-6.8.0-1041-nvidiaUpgrade linux-image-virtual-6.8Upgrade linux-image-oracle-64k | Jun 26, 2025 | Apr 16, 2025 |
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