In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: fix UAF in __blkcg_rstat_flush()
When multiple blkgs in the same blkcg are released concurrently, a use-after-free can occur. The race happens when one blkg's __blkcg_rstat_flush() removes another blkg's iostat entries via llist_del_all(). The second blkg sees an empty list and proceeds to free itself while the first is still iterating over its entries.
Move the flush from __blkg_release() (RCU callback) to blkg_release() (before call_rcu). This ensures the RCU grace period waits for any concurrent flush's rcu_read_lock() section to complete before freeing.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade perfUpgrade kernel-64k-debug-modules-extraUpgrade kernel-zfcpdump-coreUpgrade kernel-coreUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-develUpgrade python3-perfUpgrade kernel-modulesUpgrade kernel-tools-libs-develUpgrade kernel-headersUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-debug-develUpgrade kernel-zfcpdumpUpgrade kernel-64k-debugUpgrade kernel-docUpgrade kernel-abi-stablelistsUpgrade kernel-debug-develUpgrade kernel-rt-modulesUpgrade kernel-64k-coreUpgrade kernel-64k-debug-modulesUpgrade kernel-rtUpgrade kernelUpgrade kernel-rt-debugUpgrade kernel-cross-headersUpgrade kernel-64k-modules-coreUpgrade bpftoolUpgrade kernel-64kUpgrade kernel-debug-modulesUpgrade kernel-modules-extraUpgrade kernel-64k-debug-coreUpgrade kernel-toolsUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-64k-debug-modules-coreUpgrade kernel-debug-modules-extraUpgrade kernel-debug-coreUpgrade kernel-64k-modules-extraUpgrade kernel-64k-modulesUpgrade kernel-rt-debug-coreUpgrade kernel-debug-modules-coreUpgrade kernel-rt-develUpgrade kernel-debugUpgrade kernel-develUpgrade kernel-rt-modules-extraUpgrade kernel-tools-libsUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-core | Oct 11, 2026 | Sep 15, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel6.12Upgrade microvm-kernel6.18Upgrade kernel6.18-modules-extraUpgrade kernel6.18-debuginfoUpgrade bpftool6.12-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade perf6.12Upgrade kernel-livepatch-6.12.95-124.187Upgrade kernel6.12-modules-extraUpgrade kernel6.12-modules-extra-commonUpgrade python3-perf6.18Upgrade bpftool6.18-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.18-headersUpgrade kernel6.12-tools-develUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-toolsUpgrade python3-perf6.18-debuginfoUpgrade kernel6.12-debuginfoUpgrade perf6.18-debuginfoUpgrade python3-perf6.12Upgrade bpftool6.12Upgrade kernel6.18Upgrade perf6.18Upgrade kernel6.12-develUpgrade kernel6.18-modules-extra-commonUpgrade bpftool6.18Upgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-develUpgrade kernel6.18-toolsUpgrade kernel-livepatch-6.18.38-73.137Upgrade python3-perf6.12-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-headersUpgrade kernel6.18-tools-devel | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution existsUpgrade kernel-rtUpgrade kernel | Jul 22, 2026 | Jul 19, 2026 |
| Rocky_linux | — | Upgrade kernel-zfcpdumpUpgrade rvUpgrade libperfUpgrade kernel-uki-virt-addonsUpgrade bpftoolUpgrade kernel-rt-kvmUpgrade kernel-zfcpdump-modules-coreUpgrade libperf-debuginfoUpgrade kernel-debug-devel-matchedUpgrade kernel-zfcpdump-modulesUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-debug-debuginfoUpgrade kernel-rt-modules-extraUpgrade kernel-rtUpgrade kernel-rt-debug-modules-coreUpgrade kernel-toolsUpgrade kernel-debug-modulesUpgrade kernel-debuginfo-common-s390xUpgrade kernel-rt-modules-coreUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-debuginfoUpgrade kernel-tools-libs-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rt-debug-modules-extraUpgrade kernel-devel-matchedUpgrade kernel-rt-debug-coreUpgrade bpftool-debuginfoUpgrade kernel-debug-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-rt-debug-modulesUpgrade kernel-coreUpgrade kernel-debug-uki-virtUpgrade python3-perfUpgrade kernel-modules-coreUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-debug-modules-coreUpgrade kernel-rt-debug-debuginfoUpgrade kernel-rt-coreUpgrade kernel-debug-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-uki-virtUpgrade kernel-tools-libsUpgrade kernel-develUpgrade kernel-rt-debug-develUpgrade kernel-zfcpdump-develUpgrade kernel-tools-debuginfoUpgrade kernel-modulesUpgrade kernel-debugUpgrade kernelUpgrade kernel-modules-extraUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade perfUpgrade kernel-debug-develUpgrade kernel-rt-develUpgrade kernel-zfcpdump-debuginfoUpgrade rtlaUpgrade python3-perf-debuginfoUpgrade kernel-rt-debug-kvmUpgrade kernel-rt-debug | Sep 17, 2026 | Sep 16, 2026 |
| Ubuntu | — | Upgrade linux-image-gcpUpgrade linux-image-generic-hwe-26.04Upgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-realtime-64kUpgrade linux-image-gke-64kUpgrade linux-image-7.0.0-31-genericUpgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-oem-7.0Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-oracleUpgrade linux-image-nvidia-7.0Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-awsUpgrade linux-image-6.8.0-1036-nvidia-tegraUpgrade linux-image-ibmUpgrade linux-image-raspi-7.0Upgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-gcp-7.0Upgrade linux-image-oracle-64kUpgrade linux-image-generic-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-azureUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-oem-26.04Upgrade linux-image-oem-26.04aUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-raspi-realtimeUpgrade linux-image-azure-7.0Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-gke-64k-7.0Upgrade linux-image-7.0.0-1012-awsUpgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-nvidia-64kUpgrade linux-image-oem-26.04bUpgrade linux-image-6.8.0-1036-nvidia-tegra-rtUpgrade linux-image-oracle-7.0Upgrade linux-image-raspiUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-7.0.0-1006-gke-64kUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-azure-lts-26.04Upgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-7.0.0-1013-oemUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-nvidia-bos-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-gkeUpgrade linux-image-gcp-64kUpgrade linux-image-gke-7.0Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-tegraUpgrade linux-image-realtime-7.0Upgrade linux-image-virtualUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-aws-64kUpgrade linux-image-realtimeUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-virtual-7.0Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-nvidiaUpgrade linux-image-aws-7.0Upgrade linux-image-generic-64kUpgrade linux-image-aws-64k-7.0Upgrade linux-image-genericUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-generic-64k-7.0 | Sep 14, 2026 | Sep 7, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 3, 2026 | Jul 19, 2026 |
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