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In the Linux kernel, the following vulnerability has been resolved:
lib: cpu_rmap: Avoid use after free on rmap->obj array entries
When calling irq_set_affinity_notifier() with NULL at the notify argument, it will cause freeing of the glue pointer in the corresponding array entry but will leave the pointer in the array. A subsequent call to free_irq_cpu_rmap() will try to free this entry again leading to possible use after free.
Fix that by setting NULL to the array entry and checking that we have non-zero at the array entry when iterating over the array in free_irq_cpu_rmap().
The current code does not suffer from this since there are no cases where irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the notify arg) is called, followed by a call to free_irq_cpu_rmap() so we don't hit and issue. Subsequent patches in this series excersize this flow, hence the required fix.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernelUpgrade kernel-livepatch-5.15.117-72.142Upgrade kernel-debuginfo-common-x86_64Upgrade python-perfUpgrade perf-debuginfoUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-livepatch-4.14.318-240.529Upgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade kernel-livepatch-5.10.184-174.730Upgrade kernel-debuginfoUpgrade bpftoolUpgrade kernel-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-toolsUpgrade kernel-develUpgrade kernel-libbpf-staticUpgrade python3-perf-debuginfoUpgrade bpftoolUpgrade python3-perfUpgrade kernel-libbpf-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade kernelUpgrade kernel-livepatch-6.1.34-56.100Upgrade kernel-tools-debuginfoUpgrade perfUpgrade kernel-libbpfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade kernel-headersUpgrade bpftool-debuginfo | Oct 16, 2025 | Oct 1, 2025 |
| Debian | — | Upgrade linux | Oct 3, 2025 | Oct 3, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade python3-perfUpgrade kernelUpgrade kernel-abi-stablelists | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 1, 2025 |
| Ubuntu | — | Upgrade linux-nvidia-tegraUpgrade linux-raspiUpgrade linux-nvidia-tegra-5.15Upgrade linux-oracle-5.15Upgrade linux-gkeUpgrade linux-lowlatency-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-bluefieldUpgrade linux-iotUpgrade linux-lowlatencyUpgrade linux-aws-5.15Upgrade linux-hwe-5.15Upgrade linux-azureUpgrade linux-realtimeUpgrade linux-aws-5.4Upgrade linux-azure-fdeUpgrade linux-intel-iotg-5.15Upgrade linux-oracle-5.4Upgrade linux-kvmUpgrade linux-xilinx-zynqmpUpgrade linux-ibm-5.4Upgrade linux-nvidia-tegra-igxUpgrade linux-oracleUpgrade linux-azure-5.15Upgrade linux-hwe-5.4Upgrade linuxUpgrade linux-azure-fipsUpgrade linux-gcpUpgrade linux-gcp-5.4Upgrade linux-azure-5.4Upgrade linux-ibmUpgrade linux-nvidiaUpgrade linux-ibm-5.15Upgrade linux-raspi-5.4Upgrade linux-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-aws-fipsUpgrade linux-intel-iotgUpgrade linux-riscv-5.15Upgrade linux-gcp-fipsUpgrade linux-awsUpgrade linux-gkeop | Oct 10, 2025 | Oct 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 1, 2025 |
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