In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: fix panic due to PSLVERR
When the PSLVERR_RESP_EN parameter is set to 1, the device generates an error response if an attempt is made to read an empty RBR (Receive Buffer Register) while the FIFO is enabled.
In serial8250_do_startup(), calling serial_port_out(port, UART_LCR, UART_LCR_WLEN8) triggers dw8250_check_lcr(), which invokes dw8250_force_idle() and serial8250_clear_and_reinit_fifos(). The latter function enables the FIFO via serial_out(p, UART_FCR, p->fcr). Execution proceeds to the serial_port_in(port, UART_RX). This satisfies the PSLVERR trigger condition.
When another CPU (e.g., using printk()) is accessing the UART (UART is busy), the current CPU fails the check (value & ~UART_LCR_SPAR) == (lcr & ~UART_LCR_SPAR) in dw8250_check_lcr(), causing it to enter dw8250_force_idle().
Put serial_port_out(port, UART_LCR, UART_LCR_WLEN8) under the port->lock to fix this issue.
Panic backtrace: [ 0.442336] Oops - unknown exception [#1] [ 0.442343] epc : dw8250_serial_in32+0x1e/0x4a [ 0.442351] ra : serial8250_do_startup+0x2c8/0x88e ... [ 0.442416] console_on_rootfs+0x26/0x70
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-5.15.191-132.213Upgrade bpftool-debuginfoUpgrade python-perfUpgrade kernelUpgrade bpftoolUpgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade kernel-toolsUpgrade perfUpgrade perf-debuginfoUpgrade kernel-livepatch-5.10.242-239.961Upgrade kernel-debuginfoUpgrade kernel-develUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64 | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-headersUpgrade kernel-libbpf-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade bpftool6.12Upgrade bpftool6.12-debuginfoUpgrade kernel6.12-libbpf-develUpgrade kernel6.12-libbpfUpgrade kernel-toolsUpgrade python3-perf6.12-debuginfoUpgrade kernel-modules-extra-commonUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-6.12.46-66.121Upgrade perf6.12Upgrade kernel6.12-libbpf-staticUpgrade perf-debuginfoUpgrade kernel6.12-modules-extraUpgrade kernelUpgrade kernel6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-modules-extra-commonUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernel-livepatch-6.1.150-174.273Upgrade kernel-libbpf-develUpgrade kernel-develUpgrade kernel6.12-tools-develUpgrade kernel6.12-develUpgrade kernel6.12-debuginfo-common-x86_64Upgrade python3-perf-debuginfoUpgrade kernel-modules-extraUpgrade python3-perfUpgrade kernel-libbpf-staticUpgrade perfUpgrade kernel6.12-toolsUpgrade kernel6.12-libbpf-debuginfoUpgrade kernel6.12-headersUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel-tools-develUpgrade kernel-libbpfUpgrade kernel-debuginfo-common-aarch64 | Sep 30, 2025 | Sep 5, 2025 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Sep 25, 2025 | Sep 25, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernelUpgrade python3-perfUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp12 | — | Upgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade python3-perf | Jan 15, 2026 | Jan 6, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade bpftoolUpgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perf | Dec 12, 2025 | Dec 11, 2025 |
| Oracle_linux | — | Upgrade kernel-uek | Oct 14, 2025 | Sep 5, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 5, 2025 |
| Suse | — | Upgrade cluster-md-kmp-defaultUpgrade dtb-amlogicUpgrade dtb-armUpgrade kernel-sourceUpgrade kernel-debug-develUpgrade kernel-64kb-optionalUpgrade kernel-devel-azureUpgrade kernel-kvmsmall-develUpgrade dtb-socionextUpgrade dtb-qcomUpgrade dtb-lgUpgrade gfs2-kmp-rtUpgrade kernel-azure-vdsoUpgrade dtb-apmUpgrade kernel-debugUpgrade kernel-devel-rtUpgrade dtb-xilinxUpgrade dtb-freescaleUpgrade dtb-appleUpgrade kernel-64kbUpgrade kernel-zfcpdumpUpgrade dtb-amdUpgrade kernel-default-optionalUpgrade kernel-docsUpgrade kernel-kvmsmallUpgrade dtb-exynosUpgrade dlm-kmp-64kbUpgrade dtb-amazonUpgrade kernel-64kb-develUpgrade kernel-default-develUpgrade kernel-macrosUpgrade dtb-mediatekUpgrade cluster-md-kmp-azureUpgrade dtb-hisiliconUpgrade dtb-nvidiaUpgrade cluster-md-kmp-rtUpgrade reiserfs-kmp-rtUpgrade kernel-default-livepatchUpgrade dlm-kmp-azureUpgrade gfs2-kmp-64kbUpgrade kernel-azure-develUpgrade kernel-default-extraUpgrade kernel-kvmsmall-vdsoUpgrade kernel-rt-optionalUpgrade kernel-default-vdsoUpgrade dlm-kmp-defaultUpgrade kselftests-kmp-azureUpgrade kernel-rt_debug-develUpgrade ocfs2-kmp-64kbUpgrade dtb-rockchipUpgrade kernel-defaultUpgrade kernel-azure-optionalUpgrade dtb-sprdUpgrade dtb-renesasUpgrade dtb-caviumUpgrade kernel-docs-htmlUpgrade kernel-obs-buildUpgrade reiserfs-kmp-64kbUpgrade ocfs2-kmp-azureUpgrade kernel-source-rtUpgrade kernel-develUpgrade reiserfs-kmp-defaultUpgrade kernel-default-base-rebuildUpgrade kernel-source-vanillaUpgrade kernel-rt-extraUpgrade dtb-broadcomUpgrade dtb-allwinnerUpgrade kselftests-kmp-rtUpgrade ocfs2-kmp-defaultUpgrade kernel-rt_debugUpgrade kernel-default-livepatch-develUpgrade gfs2-kmp-azureUpgrade dtb-marvellUpgrade dlm-kmp-rtUpgrade cluster-md-kmp-64kbUpgrade kernel-azureUpgrade kernel-default-baseUpgrade kernel-debug-vdsoUpgrade kernel-64kb-extraUpgrade kernel-rt-vdsoUpgrade gfs2-kmp-defaultUpgrade dtb-alteraUpgrade kernel-obs-qaUpgrade kernel-rt-develUpgrade kernel-source-azureUpgrade kernel-symsUpgrade kernel-syms-rtUpgrade kernel-azure-extraUpgrade kselftests-kmp-64kbUpgrade ocfs2-kmp-rtUpgrade reiserfs-kmp-azureUpgrade kernel-rt-livepatch | Dec 5, 2025 | Oct 15, 2025 |
| Ubuntu | — | Upgrade linux-image-oracle-6.8Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-aws-fips-5.15Upgrade linux-image-xilinx-6.8Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-5.15.0-163-generic-64kUpgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-aws-64k-6.8Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-1038-nvidia-tegra-igxUpgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-gke-64kUpgrade linux-image-aws-5.15Upgrade linux-image-raspi-nolpaeUpgrade linux-image-gcpUpgrade linux-image-oem-20.04dUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-nvidia-64kUpgrade linux-image-fips-6.8Upgrade linux-image-5.15.0-1061-xilinx-zynqmpUpgrade linux-image-5.15.0-1093-gkeUpgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-5.15.0-1091-ibmUpgrade linux-image-raspi-6.8Upgrade linux-image-realtime-6.8.1Upgrade linux-image-azure-fips-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-gcp-5.15Upgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-realtimeUpgrade linux-image-realtime-5.15Upgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-generic-6.8Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-oracleUpgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-gke-64k-6.8Upgrade linux-image-raspi-5.15Upgrade linux-image-5.15.0-1092-nvidia-lowlatencyUpgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-5.15.0-1038-nvidia-tegra-igx-rtUpgrade linux-image-oem-22.04dUpgrade linux-image-virtual-5.15Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-xilinxUpgrade linux-image-azure-cvmUpgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-gcp-6.8Upgrade linux-image-azure-5.15Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-5.15.0-1097-gcpUpgrade linux-image-5.15.0-1101-azure-fipsUpgrade linux-image-5.15.0-1101-azureUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-aws-64k-5.15Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-kvmUpgrade linux-image-5.15.0-1092-nvidiaUpgrade linux-image-fips-5.15Upgrade linux-image-aws-fips-6.8Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-generic-64k-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-5.15.0-1097-aws-64kUpgrade linux-image-oem-20.04Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-5.15.0-1049-nvidia-tegraUpgrade linux-image-awsUpgrade linux-image-aws-lts-24.04Upgrade linux-image-ibm-6.8Upgrade linux-image-oracle-5.15Upgrade linux-image-gkeopUpgrade linux-image-azure-fips-5.15Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-gke-5.15Upgrade linux-image-6.8.0-1046-awsUpgrade linux-image-5.15.0-163-lowlatency-64kUpgrade linux-image-5.15.0-1049-nvidia-tegra-rtUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oem-22.04Upgrade linux-image-intelUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.8.0-100-fipsUpgrade linux-image-genericUpgrade linux-image-5.15.0-163-lowlatencyUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-oem-20.04cUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-nvidia-5.15Upgrade linux-image-gkeop-6.8Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-generic-5.15Upgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-5.15.0-1097-awsUpgrade linux-image-5.15.0-1096-realtimeUpgrade linux-image-nvidia-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1046-azureUpgrade linux-image-virtual-6.8Upgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-lowlatency-6.8Upgrade linux-image-lowlatency-5.15Upgrade linux-image-intel-iotgUpgrade linux-image-ibm-classicUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-aws-64kUpgrade linux-image-aws-6.8Upgrade linux-image-6.8.0-1051-azureUpgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-5.15.0-163-fipsUpgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-5.15.0-1089-intel-iot-realtimeUpgrade linux-image-raspiUpgrade linux-image-nvidia-tegraUpgrade linux-image-kvm-5.15Upgrade linux-image-ibmUpgrade linux-image-gkeUpgrade linux-image-generic-64kUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-oem-20.04bUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-lowlatency-64kUpgrade linux-image-azureUpgrade linux-image-5.15.0-163-generic-lpaeUpgrade linux-image-5.15.0-163-genericUpgrade linux-image-5.15.0-1092-intel-iotgUpgrade linux-image-5.15.0-1089-kvmUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-oem-22.04cUpgrade linux-image-nvidiaUpgrade linux-image-5.15.0-1097-gcp-fipsUpgrade linux-image-oem-22.04aUpgrade linux-image-azure-6.8Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-fipsUpgrade linux-image-azure-lts-24.04Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-5.15.0-1097-aws-fipsUpgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-ibm-5.15Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-5.15.0-1094-oracleUpgrade linux-image-5.15.0-1102-azureUpgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-6.8.0-100-genericUpgrade linux-image-5.15.0-1091-raspiUpgrade linux-image-5.15.0-1080-gkeopUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-gke-6.8Upgrade linux-image-generic-64k-5.15 | Dec 5, 2025 | Sep 5, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 19, 2025 | Sep 5, 2025 |
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