In the Linux kernel, the following vulnerability has been resolved:
Drivers: vmbus: Check for channel allocation before looking up relids
relid2channel() assumes vmbus channel array to be allocated when called. However, in cases such as kdump/kexec, not all relids will be reset by the host. When the second kernel boots and if the guest receives a vmbus interrupt during vmbus driver initialization before vmbus_connect() is called, before it finishes, or if it fails, the vmbus interrupt service routine is called which in turn calls relid2channel() and can cause a null pointer dereference.
Print a warning and error out in relid2channel() for a channel id that's invalid in the second kernel.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade python-perfUpgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade perfUpgrade kernel-develUpgrade kernel-debuginfoUpgrade bpftoolUpgrade kernelUpgrade kernel-tools-develUpgrade kernel-livepatch-5.10.178-162.673Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.108-65.141 | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade python3-perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-libbpf-staticUpgrade kernel-livepatch-6.1.25-37.47Upgrade kernel-develUpgrade kernel-toolsUpgrade perfUpgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade perf-debuginfoUpgrade kernel-libbpfUpgrade python3-perf | Sep 30, 2025 | Sep 16, 2025 |
| Debian | — | Upgrade linux | Sep 18, 2025 | Sep 18, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perf | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 16, 2025 |
| Ubuntu | — | Upgrade linux-xilinx-zynqmpUpgrade linux-intel-iotgUpgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-gcpUpgrade linux-realtimeUpgrade linux-azureUpgrade linux-raspiUpgrade linux-nvidiaUpgrade linux-bluefieldUpgrade linux-oracleUpgrade linux-awsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-aws-5.15Upgrade linux-riscv-5.15Upgrade linux-hwe-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-nvidia-tegra-5.15Upgrade linuxUpgrade linux-lowlatencyUpgrade linux-ibmUpgrade linux-nvidia-tegraUpgrade linux-azure-5.15Upgrade linux-oracle-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-gkeUpgrade linux-gkeopUpgrade linux-ibm-5.15 | Sep 19, 2025 | Sep 17, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 16, 2025 |
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