In the Linux kernel, the following vulnerability has been resolved:
s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()
There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on s390. Therefore we do not expect to see VM_FAULT_HWPOISON in do_exception().
However, since commit af19487f00f3 ("mm: make PTE_MARKER_SWAPIN_ERROR more general"), it is possible to see VM_FAULT_HWPOISON in combination with PTE_MARKER_POISONED, even on architectures that do not support HWPOISON otherwise. In this case, we will end up on the BUG() in do_exception().
Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault flags, for easier debugging.
Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot support swap entries on other levels than PTE level.
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 | Jul 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jul 29, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-48-lowlatency-64kUpgrade linux-image-oem-22.04bUpgrade linux-image-genericUpgrade linux-image-6.8.0-1016-azureUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-48-lowlatencyUpgrade linux-image-generic-64kUpgrade linux-image-lowlatencyUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1014-ibmUpgrade linux-image-nvidia-64kUpgrade linux-image-raspiUpgrade linux-image-ibm-classicUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-oem-22.04Upgrade linux-image-azureUpgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1017-gcpUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oem-24.04aUpgrade linux-image-gkeopUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-nvidiaUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1017-nvidiaUpgrade linux-image-azure-fdeUpgrade linux-image-gcpUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1016-azure-fdeUpgrade linux-image-oem-22.04dUpgrade linux-image-ibmUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1015-oracle-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-gkeUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1017-nvidia-lowlatencyUpgrade linux-image-6.8.0-1016-gcpUpgrade linux-image-6.8.0-1017-nvidia-lowlatency-64kUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-48-genericUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1016-oemUpgrade linux-image-6.8.0-48-generic-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1017-azure-fdeUpgrade linux-image-kvmUpgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1017-nvidia-64kUpgrade linux-image-awsUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1013-gkeUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-1014-raspiUpgrade linux-image-6.8.0-1017-azureUpgrade linux-image-6.8.0-1018-awsUpgrade linux-image-6.8.0-1015-oracleUpgrade linux-image-generic-lpae | Nov 4, 2024 | Jul 29, 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