In the Linux kernel, the following vulnerability has been resolved:
x86/kexec: Push kjump return address even for non-kjump kexec
The version of purgatory code shipped by kexec-tools attempts to look above the top of its stack to find a return address for a kjump, even in a non-kjump kexec.
After the commit in Fixes: the word above the stack might not be there, leading to a fault (which is at least now caught by my exception-handling code in kexec).
That commit fixed things for the actual kjump path, but no longer "gratuitously" pushes the unused return address to the stack in the non-kjump path. Put that *back* in the non-kjump path, to prevent purgatory from crashing when trying to access 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 |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-debuginfoUpgrade kernel6.18-tools-develUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-toolsUpgrade kernel6.18-headersUpgrade perf6.18-debuginfoUpgrade bpftool6.18-debuginfoUpgrade kernel6.18-modules-extraUpgrade kernel-livepatch-6.18.33-63.124Upgrade kernel6.18-develUpgrade python3-perf6.18-debuginfoUpgrade python3-perf6.18Upgrade perf6.18Upgrade kernel6.18-modules-extra-commonUpgrade bpftool6.18Upgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.18 | Jul 13, 2026 | Jun 26, 2026 |
| Ubuntu | — | Upgrade linux-image-nvidia-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-nvidiaUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-7.0.0-1008-gcpUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-oem-24.04bUpgrade linux-image-7.0.0-28-realtime-64kUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-realtime-7.0Upgrade linux-image-virtual-7.0Upgrade linux-image-awsUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-raspi-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-7.0.0-28-realtimeUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-azure-fde-7.0Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-7.0.0-28-genericUpgrade linux-image-7.0.0-28-generic-64kUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-oracleUpgrade linux-image-genericUpgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-azure-fdeUpgrade linux-image-aws-64k-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-7.0.0-1009-awsUpgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-gke-64kUpgrade linux-image-gke-7.0Upgrade linux-image-7.0.0-1009-oemUpgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-7.0.0-1003-gke-64kUpgrade linux-image-gcp-7.0Upgrade linux-image-ibmUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-oem-26.04aUpgrade linux-image-nvidia-64kUpgrade linux-image-aws-64kUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-oem-24.04cUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-gcp-64kUpgrade linux-image-azure-7.0Upgrade linux-image-nvidia-bos-7.0Upgrade linux-image-oem-26.04Upgrade linux-image-gcpUpgrade linux-image-generic-7.0Upgrade linux-image-generic-64kUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-azureUpgrade linux-image-gke-64k-7.0Upgrade linux-image-gkeUpgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-oem-7.0Upgrade linux-image-nvidia-bos-64kUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-7.0.0-1003-gkeUpgrade linux-image-7.0.0-1008-gcp-64kUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-generic-64k-7.0Upgrade linux-image-raspiUpgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-virtualUpgrade linux-image-raspi-realtimeUpgrade linux-image-oem-24.04dUpgrade linux-image-oem-24.04aUpgrade linux-image-oem-24.04Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-realtime-64kUpgrade linux-image-realtimeUpgrade linux-image-oracle-64k | Jul 20, 2026 | Jun 26, 2026 |
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