In the Linux kernel, the following vulnerability has been resolved:
serial/pmac_zilog: Remove flawed mitigation for rx irq flood
The mitigation was intended to stop the irq completely. That may be better than a hard lock-up but it turns out that you get a crash anyway if you're using pmac_zilog as a serial console:
ttyPZ0: pmz: rx irq flood ! BUG: spinlock recursion on CPU#0, swapper/0
That's because the pr_err() call in pmz_receive_chars() results in pmz_console_write() attempting to lock a spinlock already locked in pmz_interrupt(). With CONFIG_DEBUG_SPINLOCK=y, this produces a fatal BUG splat. The spinlock in question is the one in struct uart_port.
Even when it's not fatal, the serial port rx function ceases to work. Also, the iteration limit doesn't play nicely with QEMU, as can be seen in the bug report linked below.
A web search for other reports of the error message "pmz: rx irq flood" didn't produce anything. So I don't think this code is needed any more. Remove it.
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 |
|---|---|---|---|---|
| Debian | — | Upgrade linux | May 8, 2024 | May 1, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 1, 2024 |
| Suse | — | Upgrade kernel-64kb-optionalUpgrade gfs2-kmp-defaultUpgrade kernel-default-optionalUpgrade kernel-sourceUpgrade kernel-64kb-livepatch-develUpgrade kernel-default-livepatchUpgrade dtb-exynosUpgrade kernel-devel-azureUpgrade kernel-rt_debug-develUpgrade kernel-source-rtUpgrade kernel-docs-htmlUpgrade kselftests-kmp-64kbUpgrade ocfs2-kmp-64kbUpgrade kernel-zfcpdumpUpgrade ocfs2-kmp-azureUpgrade kernel-source-azureUpgrade kernel-obs-buildUpgrade kernel-kvmsmallUpgrade dtb-appleUpgrade kernel-default-vdsoUpgrade kernel-debug-vdsoUpgrade kernel-kvmsmall-develUpgrade dlm-kmp-64kbUpgrade kernel-kvmsmall-livepatch-develUpgrade gfs2-kmp-rtUpgrade gfs2-kmp-64kbUpgrade dtb-hisiliconUpgrade dtb-marvellUpgrade dtb-broadcomUpgrade dtb-xilinxUpgrade kernel-rt-optionalUpgrade kernel-kvmsmall-vdsoUpgrade kernel-source-vanillaUpgrade kernel-azure-optionalUpgrade ocfs2-kmp-defaultUpgrade kernel-azure-livepatch-develUpgrade reiserfs-kmp-64kbUpgrade kernel-syms-azureUpgrade dtb-allwinnerUpgrade kernel-azureUpgrade dtb-amazonUpgrade kernel-debugUpgrade kernel-64kbUpgrade kernel-rt-extraUpgrade kernel-azure-develUpgrade kernel-rt-vdsoUpgrade kernel-develUpgrade dtb-caviumUpgrade dtb-qcomUpgrade dtb-lgUpgrade kernel-azure-extraUpgrade kernel-rtUpgrade dtb-alteraUpgrade cluster-md-kmp-rtUpgrade cluster-md-kmp-azureUpgrade kernel-default-develUpgrade gfs2-kmp-azureUpgrade kselftests-kmp-azureUpgrade dtb-freescaleUpgrade kernel-rt-livepatchUpgrade kernel-debug-livepatch-develUpgrade kernel-defaultUpgrade reiserfs-kmp-defaultUpgrade reiserfs-kmp-rtUpgrade kernel-default-livepatch-develUpgrade kernel-64kb-develUpgrade kernel-debug-develUpgrade kernel-default-base-rebuildUpgrade dtb-renesasUpgrade kselftests-kmp-rtUpgrade kernel-azure-vdsoUpgrade kernel-rt_debug-livepatch-develUpgrade cluster-md-kmp-64kbUpgrade kernel-rt_debug-vdsoUpgrade ocfs2-kmp-rtUpgrade kernel-obs-qaUpgrade kernel-64kb-extraUpgrade kernel-devel-rtUpgrade dtb-socionextUpgrade dtb-rockchipUpgrade dtb-amdUpgrade reiserfs-kmp-azureUpgrade kselftests-kmp-defaultUpgrade dtb-amlogicUpgrade dlm-kmp-rtUpgrade cluster-md-kmp-defaultUpgrade kernel-syms-rtUpgrade kernel-rt_debugUpgrade kernel-macrosUpgrade dtb-armUpgrade kernel-default-baseUpgrade dtb-mediatekUpgrade kernel-docsUpgrade dlm-kmp-azureUpgrade kernel-rt-livepatch-develUpgrade dtb-sprdUpgrade kernel-symsUpgrade kernel-default-extraUpgrade dtb-nvidiaUpgrade dtb-apmUpgrade dlm-kmp-defaultUpgrade kernel-rt-devel | Jun 13, 2024 | May 1, 2024 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1058-ibmUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-gke-5.15Upgrade linux-image-oem-20.04cUpgrade linux-image-6.8.0-1007-raspiUpgrade linux-image-5.4.0-1127-oracleUpgrade linux-image-5.15.0-1064-gcpUpgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-1008-oemUpgrade linux-image-ibm-classicUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1006-gkeUpgrade linux-image-6.8.0-1008-oracleUpgrade linux-image-5.4.0-189-genericUpgrade linux-image-oem-osp1Upgrade linux-image-5.15.0-116-genericUpgrade linux-image-5.15.0-116-generic-64kUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-ibm-lts-20.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-aws-lts-20.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-gcp-lts-20.04Upgrade linux-image-5.15.0-1062-gkeUpgrade linux-image-5.4.0-1132-gcpUpgrade linux-image-oem-20.04dUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-5.4.0-1075-ibmUpgrade linux-image-raspi-hwe-18.04Upgrade linux-image-oracle-64kUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1060-nvidia-lowlatencyUpgrade linux-image-5.15.0-1065-awsUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-kvmUpgrade linux-image-azure-fdeUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-5.4.0-1040-iotUpgrade linux-image-6.8.0-1008-ibmUpgrade linux-image-5.15.0-1048-gkeopUpgrade linux-image-5.15.0-1068-azure-fdeUpgrade linux-image-6.8.0-38-genericUpgrade linux-image-6.8.0-1007-intelUpgrade linux-image-generic-hwe-18.04Upgrade linux-image-5.4.0-1047-xilinx-zynqmpUpgrade linux-image-raspi2Upgrade linux-image-virtualUpgrade linux-image-oem-24.04aUpgrade linux-image-ibmUpgrade linux-image-azure-cvmUpgrade linux-image-5.4.0-1095-gkeopUpgrade linux-image-gcpUpgrade linux-image-5.15.0-116-generic-lpaeUpgrade linux-image-awsUpgrade linux-image-5.4.0-189-generic-lpaeUpgrade linux-image-intelUpgrade linux-image-6.8.0-1011-awsUpgrade linux-image-5.15.0-116-lowlatencyUpgrade linux-image-5.15.0-1068-azureUpgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-6.8.0-1009-nvidiaUpgrade linux-image-raspiUpgrade linux-image-5.4.0-1116-kvmUpgrade linux-image-generic-64kUpgrade linux-image-5.15.0-116-lowlatency-64kUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-5.4.0-1088-bluefieldUpgrade linux-image-6.8.0-1010-azure-fdeUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-64kUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-bluefieldUpgrade linux-image-5.15.0-1060-intel-iotgUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-1010-gcpUpgrade linux-image-gkeop-5.4Upgrade linux-image-6.8.0-38-lowlatencyUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-5.4.0-1112-raspiUpgrade linux-image-oem-24.04Upgrade linux-image-5.4.0-1133-azureUpgrade linux-image-5.15.0-1035-xilinx-zynqmpUpgrade linux-image-gkeUpgrade linux-image-6.8.0-38-generic-64kUpgrade linux-image-6.8.0-38-lowlatency-64kUpgrade linux-image-5.15.0-1065-gcpUpgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-1058-raspiUpgrade linux-image-lowlatencyUpgrade linux-image-intel-iotgUpgrade linux-image-azure-lts-22.04Upgrade linux-image-nvidiaUpgrade linux-image-oem-20.04bUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1009-nvidia-64kUpgrade linux-image-raspi-nolpaeUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-oracleUpgrade linux-image-5.4.0-189-lowlatencyUpgrade linux-image-5.15.0-1062-kvmUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-azureUpgrade linux-image-5.15.0-1060-nvidiaUpgrade linux-image-oemUpgrade linux-image-oem-20.04Upgrade linux-image-genericUpgrade linux-image-azure-lts-20.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-5.15.0-1063-oracleUpgrade linux-image-6.8.0-1008-oracle-64kUpgrade linux-image-6.8.0-1010-azureUpgrade linux-image-5.4.0-1128-aws | Jul 12, 2024 | May 1, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | May 1, 2024 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub