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In the Linux kernel, the following vulnerability has been resolved:
tty: xilinx_uartps: split sysrq handling
lockdep detects the following circular locking dependency:
CPU 0 CPU 1 ========================== ============================ cdns_uart_isr() printk() uart_port_lock(port) console_lock() cdns_uart_console_write() if (!port->sysrq) uart_port_lock(port) uart_handle_break() port->sysrq = ... uart_handle_sysrq_char() printk() console_lock()
The fixed commit attempts to avoid this situation by only taking the port lock in cdns_uart_console_write if port->sysrq unset. However, if (as shown above) cdns_uart_console_write runs before port->sysrq is set, then it will try to take the port lock anyway. This may result in a deadlock.
Fix this by splitting sysrq handling into two parts. We use the prepare helper under the port lock and defer handling until we release the lock.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Mar 17, 2025 | Feb 27, 2025 |
| Suse | — | Upgrade dlm-kmp-rtUpgrade kernel-debugUpgrade kernel-docsUpgrade ocfs2-kmp-azureUpgrade kernel-azure-extraUpgrade gfs2-kmp-64kbUpgrade kselftests-kmp-rtUpgrade gfs2-kmp-azureUpgrade dtb-hisiliconUpgrade reiserfs-kmp-rtUpgrade cluster-md-kmp-64kbUpgrade dlm-kmp-defaultUpgrade kernel-debug-develUpgrade ocfs2-kmp-rtUpgrade dtb-socionextUpgrade dtb-xilinxUpgrade kernel-zfcpdumpUpgrade dtb-caviumUpgrade dtb-marvellUpgrade kernel-64kb-optionalUpgrade reiserfs-kmp-defaultUpgrade kernel-64kb-extraUpgrade kernel-64kb-develUpgrade dtb-allwinnerUpgrade kernel-rt_debug-develUpgrade gfs2-kmp-defaultUpgrade dtb-amdUpgrade ocfs2-kmp-64kbUpgrade kernel-default-livepatchUpgrade dtb-appleUpgrade dtb-amazonUpgrade kernel-64kbUpgrade kselftests-kmp-defaultUpgrade kernel-defaultUpgrade kernel-devel-rtUpgrade kernel-symsUpgrade dlm-kmp-azureUpgrade kernel-default-baseUpgrade dtb-renesasUpgrade kernel-default-develUpgrade reiserfs-kmp-64kbUpgrade kernel-default-livepatch-develUpgrade kernel-docs-htmlUpgrade kernel-rt_debugUpgrade kernel-develUpgrade dtb-broadcomUpgrade dtb-freescaleUpgrade dtb-sprdUpgrade ocfs2-kmp-defaultUpgrade dtb-apmUpgrade cluster-md-kmp-azureUpgrade kernel-source-rtUpgrade gfs2-kmp-rtUpgrade kernel-default-extraUpgrade kernel-azure-develUpgrade dtb-exynosUpgrade kernel-azureUpgrade kernel-rt-extraUpgrade kernel-rtUpgrade kernel-azure-optionalUpgrade dtb-mediatekUpgrade kernel-obs-qaUpgrade kernel-obs-buildUpgrade dtb-rockchipUpgrade kernel-source-azureUpgrade kernel-devel-azureUpgrade kernel-default-vdsoUpgrade kernel-default-optionalUpgrade kernel-rt_debug-vdsoUpgrade kernel-kvmsmallUpgrade kernel-azure-vdsoUpgrade dlm-kmp-64kbUpgrade kernel-source-vanillaUpgrade kernel-syms-rtUpgrade kernel-sourceUpgrade kernel-kvmsmall-develUpgrade dtb-qcomUpgrade cluster-md-kmp-rtUpgrade kselftests-kmp-azureUpgrade kernel-syms-azureUpgrade kernel-macrosUpgrade dtb-nvidiaUpgrade kernel-default-base-rebuildUpgrade kernel-rt-develUpgrade kernel-kvmsmall-vdsoUpgrade dtb-lgUpgrade dtb-alteraUpgrade reiserfs-kmp-azureUpgrade kernel-rt-optionalUpgrade kernel-rt-livepatch-develUpgrade kernel-rt-vdsoUpgrade dtb-armUpgrade dtb-amlogicUpgrade cluster-md-kmp-defaultUpgrade kselftests-kmp-64kbUpgrade kernel-debug-vdso | Dec 5, 2025 | Jun 12, 2025 |
| Ubuntu | — | Upgrade linux-image-oem-24.04Upgrade linux-image-5.15.0-140-lowlatency-64kUpgrade linux-image-generic-64kUpgrade linux-image-6.11.0-1014-lowlatencyUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gcp-fipsUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.11.0-1022-oemUpgrade linux-image-5.15.0-1084-realtimeUpgrade linux-image-gke-6.8Upgrade linux-image-aws-64kUpgrade linux-image-azureUpgrade linux-image-6.8.0-2026-raspi-realtimeUpgrade linux-image-6.8.0-64-genericUpgrade linux-image-6.11.0-1015-azureUpgrade linux-image-aws-6.8Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-5.15.0-1084-aws-fipsUpgrade linux-image-nvidia-6.8Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-5.15.0-1089-azure-fipsUpgrade linux-image-nvidia-tegraUpgrade linux-image-azure-nvidia-6.8Upgrade linux-image-5.15.0-1080-kvmUpgrade linux-image-oem-6.8Upgrade linux-image-6.8.0-1029-oracleUpgrade linux-image-azure-nvidiaUpgrade linux-image-fipsUpgrade linux-image-oem-20.04Upgrade linux-image-6.8.0-64-lowlatency-64kUpgrade linux-image-gkeUpgrade linux-image-intelUpgrade linux-image-5.15.0-1083-gcpUpgrade linux-image-gkeop-6.8Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.11.0-1014-awsUpgrade linux-image-virtual-6.8Upgrade linux-image-azure-nvidia-lts-24.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-intel-iotgUpgrade linux-image-lowlatencyUpgrade linux-image-oem-24.04bUpgrade linux-image-gkeopUpgrade linux-image-oem-20.04bUpgrade linux-image-6.11.0-1015-gcpUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-5.15.0-1076-ibmUpgrade linux-image-6.8.0-1031-oemUpgrade linux-image-5.15.0-142-generic-lpaeUpgrade linux-image-6.11.0-26-genericUpgrade linux-image-azure-lts-24.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-aws-fipsUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-gke-5.15Upgrade linux-image-6.11.0-26-generic-64kUpgrade linux-image-5.15.0-1037-nvidia-tegraUpgrade linux-image-raspiUpgrade linux-image-ibmUpgrade linux-image-genericUpgrade linux-image-nvidiaUpgrade linux-image-6.11.0-1015-azure-fdeUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-5.15.0-1078-nvidiaUpgrade linux-image-5.15.0-1078-raspiUpgrade linux-image-5.15.0-140-lowlatencyUpgrade linux-image-oem-22.04cUpgrade linux-image-6.11.0-1015-gcp-64kUpgrade linux-image-azure-lts-22.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-5.15.0-1081-gkeUpgrade linux-image-6.8.1-1025-realtimeUpgrade linux-image-azure-fde-6.8Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-generic-lpaeUpgrade linux-image-oem-22.04Upgrade linux-image-oem-22.04aUpgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-1031-nvidia-lowlatencyUpgrade linux-image-oem-20.04cUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-ibm-classicUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-gcp-6.8Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-gcpUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-64-lowlatencyUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1032-awsUpgrade linux-image-azure-fdeUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-oracle-6.8Upgrade linux-image-aws-lts-22.04Upgrade linux-image-generic-6.8Upgrade linux-image-6.8.0-1029-oracle-64kUpgrade linux-image-oem-20.04dUpgrade linux-image-oem-22.04dUpgrade linux-image-6.11.0-1016-oracleUpgrade linux-image-5.15.0-1037-nvidia-tegra-rtUpgrade linux-image-5.15.0-140-genericUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-5.15.0-1078-nvidia-lowlatencyUpgrade linux-image-gkeop-5.15Upgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1029-ibmUpgrade linux-image-6.11.0-1010-realtimeUpgrade linux-image-5.15.0-1077-intel-iot-realtimeUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1015-gkeopUpgrade linux-image-5.15.0-1066-gkeopUpgrade linux-image-6.8.0-1033-gcp-64kUpgrade linux-image-gcp-64kUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-generic-64k-6.8Upgrade linux-image-5.15.0-1081-oracleUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-5.15.0-142-generic-64kUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1034-azure-fdeUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-6.8.0-1032-aws-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-raspi-realtimeUpgrade linux-image-5.15.0-1089-azureUpgrade linux-image-6.8.0-1022-azure-nvidiaUpgrade linux-image-oem-22.04bUpgrade linux-image-6.11.0-1013-raspiUpgrade linux-image-azure-cvmUpgrade linux-image-raspi-nolpaeUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-5.15.0-140-generic-lpaeUpgrade linux-image-6.8.0-1031-raspiUpgrade linux-image-6.8.0-64-generic-64kUpgrade linux-image-5.15.0-1083-gcp-fipsUpgrade linux-image-realtimeUpgrade linux-image-6.8.0-1028-gkeUpgrade linux-image-5.15.0-1050-xilinx-zynqmpUpgrade linux-image-aws-lts-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-5.15.0-140-generic-64kUpgrade linux-image-5.15.0-1026-nvidia-tegra-igxUpgrade linux-image-5.15.0-140-fipsUpgrade linux-image-5.15.0-1079-intel-iotgUpgrade linux-image-awsUpgrade linux-image-raspi-6.8Upgrade linux-image-5.15.0-1026-nvidia-tegra-igx-rtUpgrade linux-image-6.8.0-1033-gcpUpgrade linux-image-5.15.0-142-genericUpgrade linux-image-azure-fipsUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-kvmUpgrade linux-image-6.8.0-1034-azureUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1031-nvidia-64kUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1031-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1031-nvidiaUpgrade linux-image-ibm-6.8Upgrade linux-image-6.11.0-1016-oracle-64kUpgrade linux-image-5.15.0-1084-awsUpgrade linux-image-6.11.0-1014-lowlatency-64kUpgrade linux-image-realtime-6.8.1Upgrade linux-image-oem-24.04aUpgrade linux-image-nvidia-hwe-22.04 | May 20, 2025 | Feb 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 10, 2025 | Feb 27, 2025 |
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