In the Linux kernel, the following vulnerability has been resolved:
posix-timers: Prevent RT livelock in itimer_delete()
itimer_delete() has a retry loop when the timer is concurrently expired. On non-RT kernels this just spin-waits until the timer callback has completed, except for posix CPU timers which have HAVE_POSIX_CPU_TIMERS_TASK_WORK enabled.
In that case and on RT kernels the existing task could live lock when preempting the task which does the timer delivery.
Replace spin_unlock() with an invocation of timer_wait_running() to handle it the same way as the other retry loops in the posix timer code.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-5.15.122-77.145Upgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade kernelUpgrade kernel-toolsUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python-perfUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-5.10.192-182.736Upgrade perf-debuginfoUpgrade kernel-headersUpgrade perfUpgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64 | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfoUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-libbpfUpgrade kernel-tools-debuginfoUpgrade python3-perf-debuginfoUpgrade kernel-develUpgrade kernel-libbpf-develUpgrade kernel-toolsUpgrade kernel-libbpf-staticUpgrade perf-debuginfoUpgrade perfUpgrade kernel-tools-develUpgrade kernel-headersUpgrade kernel-livepatch-6.1.41-63.109Upgrade python3-perfUpgrade kernel-debuginfo-common-aarch64 | Jan 12, 2026 | Dec 9, 2025 |
| Debian | — | Upgrade linux | Dec 10, 2025 | Dec 10, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade kernel-tools-libsUpgrade kernelUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 9, 2025 |
| Ubuntu | — | Upgrade linux-xilinx-zynqmpUpgrade linux-nvidiaUpgrade linuxUpgrade linux-oracleUpgrade linux-intel-iot-realtimeUpgrade linux-azure-5.15Upgrade linux-ibm-5.15Upgrade linux-ibmUpgrade linux-oracle-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-lowlatencyUpgrade linux-gkeopUpgrade linux-gcp-5.15Upgrade linux-kvmUpgrade linux-gkeUpgrade linux-hwe-5.15Upgrade linux-realtimeUpgrade linux-awsUpgrade linux-intel-iotg-5.15Upgrade linux-aws-5.15Upgrade linux-raspiUpgrade linux-riscv-5.15Upgrade linux-gcpUpgrade linux-azureUpgrade linux-nvidia-tegraUpgrade linux-intel-iotgUpgrade linux-lowlatency-hwe-5.15Upgrade linux-bluefieldUpgrade linux-nvidia-tegra-5.15 | Dec 11, 2025 | Dec 9, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 9, 2025 |
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