In the Linux kernel, the following vulnerability has been resolved:
io_uring/eventfd: ensure io_eventfd_signal() defers another RCU period
io_eventfd_do_signal() is invoked from an RCU callback, but when dropping the reference to the io_ev_fd, it calls io_eventfd_free() directly if the refcount drops to zero. This isn't correct, as any potential freeing of the io_ev_fd should be deferred another RCU grace period.
Just call io_eventfd_put() rather than open-code the dec-and-test and free, which will correctly defer it another RCU grace period.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.1Upgrade linux | Feb 10, 2025 | Jan 20, 2025 |
| Redhat_linux | — | Upgrade kernel-rtUpgrade kernel | Jan 27, 2026 | Jan 20, 2025 |
| Rocky_linux | — | Upgrade kernel-zfcpdump-debuginfoUpgrade kernel-tools-libs-develUpgrade rtlaUpgrade perf-debuginfoUpgrade kernel-rt-debugUpgrade kernel-debug-develUpgrade kernel-debug-uki-virtUpgrade perfUpgrade libperf-debuginfoUpgrade kernel-develUpgrade kernel-debuginfoUpgrade kernel-rt-modules-extraUpgrade kernelUpgrade kernel-zfcpdump-develUpgrade kernel-rt-coreUpgrade kernel-devel-matchedUpgrade python3-perfUpgrade libperfUpgrade kernel-rt-modulesUpgrade kernel-zfcpdumpUpgrade kernel-zfcpdump-modules-coreUpgrade python3-perf-debuginfoUpgrade kernel-rt-debug-develUpgrade kernel-rt-debug-modulesUpgrade kernel-toolsUpgrade kernel-uki-virtUpgrade kernel-rt-debuginfoUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-debug-modules-coreUpgrade kernel-modulesUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-develUpgrade kernel-modules-coreUpgrade kernel-tools-debuginfoUpgrade rvUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-debuginfo-common-x86_64 | Feb 5, 2026 | Nov 27, 2025 |
| Suse | — | Upgrade kernel-default-baseUpgrade kernel-rt-livepatch-develUpgrade kselftests-kmp-rtUpgrade kselftests-kmp-defaultUpgrade kernel-docs-htmlUpgrade kernel-rt_debug-vdsoUpgrade dtb-amdUpgrade kernel-default-livepatch-develUpgrade kernel-rt_debugUpgrade reiserfs-kmp-defaultUpgrade kernel-default-livepatchUpgrade dtb-amazonUpgrade ocfs2-kmp-rtUpgrade dtb-freescaleUpgrade ocfs2-kmp-64kbUpgrade gfs2-kmp-defaultUpgrade kernel-kvmsmall-vdsoUpgrade dtb-socionextUpgrade gfs2-kmp-64kbUpgrade kernel-azureUpgrade dtb-broadcomUpgrade dtb-hisiliconUpgrade reiserfs-kmp-64kbUpgrade kernel-default-extraUpgrade kernel-default-develUpgrade kernel-rt-optionalUpgrade kernel-64kb-extraUpgrade kernel-azure-vdsoUpgrade kernel-macrosUpgrade kernel-obs-qaUpgrade dtb-amlogicUpgrade ocfs2-kmp-azureUpgrade kernel-symsUpgrade kernel-zfcpdumpUpgrade dtb-renesasUpgrade reiserfs-kmp-rtUpgrade kernel-azure-extraUpgrade kernel-source-rtUpgrade kernel-64kb-optionalUpgrade dtb-marvellUpgrade dtb-appleUpgrade kernel-64kbUpgrade kernel-debugUpgrade kernel-docsUpgrade kernel-source-vanillaUpgrade cluster-md-kmp-64kbUpgrade kernel-rt-vdsoUpgrade cluster-md-kmp-defaultUpgrade kernel-defaultUpgrade kernel-rt_debug-develUpgrade kselftests-kmp-azureUpgrade dlm-kmp-azureUpgrade dtb-sprdUpgrade kernel-debug-develUpgrade dlm-kmp-defaultUpgrade dlm-kmp-rtUpgrade dtb-apmUpgrade kernel-syms-rtUpgrade kernel-devel-azureUpgrade dtb-allwinnerUpgrade kselftests-kmp-64kbUpgrade gfs2-kmp-azureUpgrade dtb-xilinxUpgrade ocfs2-kmp-defaultUpgrade cluster-md-kmp-rtUpgrade kernel-default-base-rebuildUpgrade gfs2-kmp-rtUpgrade kernel-sourceUpgrade kernel-default-vdsoUpgrade kernel-rt-extraUpgrade kernel-devel-rtUpgrade dtb-caviumUpgrade kernel-rt-develUpgrade dtb-exynosUpgrade kernel-azure-optionalUpgrade dtb-nvidiaUpgrade kernel-obs-buildUpgrade kernel-64kb-develUpgrade dtb-lgUpgrade dtb-qcomUpgrade dlm-kmp-64kbUpgrade cluster-md-kmp-azureUpgrade dtb-mediatekUpgrade kernel-develUpgrade kernel-azure-develUpgrade dtb-armUpgrade reiserfs-kmp-azureUpgrade kernel-source-azureUpgrade kernel-kvmsmall-develUpgrade kernel-kvmsmallUpgrade kernel-default-optionalUpgrade dtb-alteraUpgrade dtb-rockchipUpgrade kernel-debug-vdsoUpgrade kernel-syms-azureUpgrade kernel-rt | Feb 12, 2025 | Jan 20, 2025 |
| Ubuntu | — | Upgrade linux-image-azure-fdeUpgrade linux-image-oem-22.04Upgrade linux-image-ibmUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-6.11.0-21-generic-64kUpgrade linux-image-6.11.0-1011-gcp-64kUpgrade linux-image-6.8.0-1026-oracle-64kUpgrade linux-image-6.8.0-1028-nvidia-64kUpgrade linux-image-6.8.0-1016-azure-nvidiaUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.11.0-1013-oracleUpgrade linux-image-6.11.0-1012-azure-fdeUpgrade linux-image-6.11.0-1017-oemUpgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-6.8.0-60-lowlatencyUpgrade linux-image-6.8.0-1029-awsUpgrade linux-image-nvidiaUpgrade linux-image-6.8.0-1026-ibmUpgrade linux-image-6.8.0-1012-gkeopUpgrade linux-image-6.8.0-1025-gkeUpgrade linux-image-azure-nvidiaUpgrade linux-image-6.11.0-1011-gcpUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-azureUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-6.11.0-21-genericUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-6.11.0-1012-azureUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-raspiUpgrade linux-image-azure-lts-24.04Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.11.0-1011-lowlatencyUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-oem-22.04cUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-60-genericUpgrade linux-image-generic-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.11.0-1007-realtimeUpgrade linux-image-nvidia-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-kvmUpgrade linux-image-6.8.1-1022-realtimeUpgrade linux-image-realtimeUpgrade linux-image-virtualUpgrade linux-image-gkeop-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-60-lowlatency-64kUpgrade linux-image-6.8.0-1028-oemUpgrade linux-image-oem-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1030-gcp-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-60-generic-64kUpgrade linux-image-6.11.0-1011-awsUpgrade linux-image-raspi-realtimeUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1028-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1029-azure-fdeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1026-oracleUpgrade linux-image-awsUpgrade linux-image-oem-24.04bUpgrade linux-image-6.11.0-1011-lowlatency-64kUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-6.8.0-1028-nvidia-lowlatencyUpgrade linux-image-6.8.0-1029-azureUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1028-nvidiaUpgrade linux-image-gcpUpgrade linux-image-6.11.0-1013-oracle-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-gkeopUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidia-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-genericUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.11.0-1010-raspiUpgrade linux-image-oracle-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gkeUpgrade linux-image-6.8.0-1030-gcpUpgrade linux-image-generic-lpaeUpgrade linux-image-gcp-lts-24.04 | Mar 28, 2025 | Jan 20, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | Jan 20, 2025 |
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