In the Linux kernel, the following vulnerability has been resolved:
x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL
Baoquan reported that after triggering a crash the subsequent crash-kernel fails to boot about half of the time. It triggers a NULL pointer dereference in the periodic tick code.
This happens because the legacy timer interrupt (IRQ0) is resent in software which happens in soft interrupt (tasklet) context. In this context get_irq_regs() returns NULL which leads to the NULL pointer dereference.
The reason for the resend is a spurious APIC interrupt on the IRQ0 vector which is captured and leads to a resend when the legacy timer interrupt is enabled. This is wrong because the legacy PIC interrupts are level triggered and therefore should never be resent in software, but nothing ever sets the IRQ_LEVEL flag on those interrupts, so the core code does not know about their trigger type.
Ensure that IRQ_LEVEL is set when the legacy PCI interrupts are set up.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade kernelUpgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-livepatch-4.14.305-227.531Upgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-headersUpgrade bpftoolUpgrade perfUpgrade kernel-livepatch-5.10.167-147.601Upgrade kernel-livepatch-5.15.93-55.139Upgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade python-perf | May 21, 2025 | Mar 27, 2025 |
| Debian | — | Upgrade linux | Mar 31, 2025 | Mar 27, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade kernelUpgrade bpftoolUpgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Jul 1, 2025 | Mar 27, 2025 |
| Redhat_linux | — | Upgrade kernelNo solution exists | Jul 9, 2025 | Mar 27, 2025 |
| Ubuntu | — | Upgrade linux-kvmUpgrade linux-realtimeUpgrade linux-intel-iotg-5.15Upgrade linux-azure-fipsUpgrade linux-gcp-fipsUpgrade linux-xilinx-zynqmpUpgrade linux-azure-5.4Upgrade linux-oracle-5.15Upgrade linux-intel-iotgUpgrade linux-aws-5.4Upgrade linux-gcpUpgrade linux-hwe-5.4Upgrade linux-oracleUpgrade linux-azure-5.15Upgrade linux-ibmUpgrade linux-aws-fipsUpgrade linux-gcp-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-fipsUpgrade linux-nvidiaUpgrade linux-aws-hweUpgrade linux-azure-fdeUpgrade linux-riscv-5.15Upgrade linux-gcp-4.15Upgrade linux-hweUpgrade linux-gkeUpgrade linux-hwe-5.15Upgrade linux-gkeopUpgrade linux-lowlatencyUpgrade linux-azureUpgrade linux-gcp-5.4Upgrade linux-oracle-5.4Upgrade linux-aws-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-raspiUpgrade linux-bluefieldUpgrade linux-raspi-5.4Upgrade linux-ibm-5.4Upgrade linux-iotUpgrade linuxUpgrade linux-azure-4.15Upgrade linux-aws | Apr 1, 2025 | Mar 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Mar 27, 2025 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub