In the Linux kernel, the following vulnerability has been resolved:
RDMA/bnxt_re: Prevent handling any completions after qp destroy
HW may generate completions that indicates QP is destroyed. Driver should not be scheduling any more completion handlers for this QP, after the QP is destroyed. Since CQs are active during the QP destroy, driver may still schedule completion handlers. This can cause a race where the destroy_cq and poll_cq running simultaneously.
Snippet of kernel panic while doing bnxt_re driver load unload in loop. This indicates a poll after the CQ is freed.
[77786.481636] Call Trace: [77786.481640] <TASK> [77786.481644] bnxt_re_poll_cq+0x14a/0x620 [bnxt_re] [77786.481658] ? kvm_clock_read+0x14/0x30 [77786.481693] __ib_process_cq+0x57/0x190 [ib_core] [77786.481728] ib_cq_poll_work+0x26/0x80 [ib_core] [77786.481761] process_one_work+0x1e5/0x3f0 [77786.481768] worker_thread+0x50/0x3a0 [77786.481785] ? __pfx_worker_thread+0x10/0x10 [77786.481790] kthread+0xe2/0x110 [77786.481794] ? __pfx_kthread+0x10/0x10 [77786.481797] ret_from_fork+0x2c/0x50
To avoid this, complete all completion handlers before returning the destroy QP. If free_cq is called soon after destroy_qp, IB stack will cancel the CQ work before invoking the destroy_cq verb and this will prevent any race mentioned.
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 | Dec 29, 2025 | Dec 29, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-toolsUpgrade python3-perfUpgrade bpftoolUpgrade kernel-tools-libs | Mar 17, 2026 | Mar 16, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libs | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade linux-awsUpgrade linux-nvidia-tegra-5.15Upgrade linux-realtimeUpgrade linux-azureUpgrade linux-aws-5.15Upgrade linux-gcpUpgrade linux-ibm-5.15Upgrade linux-nvidia-tegraUpgrade linux-lowlatency-hwe-5.15Upgrade linux-bluefieldUpgrade linux-hwe-5.15Upgrade linux-gkeUpgrade linux-raspiUpgrade linux-riscv-5.15Upgrade linux-gcp-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-gkeopUpgrade linux-nvidiaUpgrade linux-intel-iot-realtimeUpgrade linux-intel-iotgUpgrade linux-nvidia-tegra-igxUpgrade linux-azure-5.15Upgrade linux-ibmUpgrade linux-oracle-5.15Upgrade linux-lowlatencyUpgrade linux-oracleUpgrade linuxUpgrade linux-kvm | Jan 6, 2026 | Dec 24, 2025 |
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