Bug 2395262 (CVE-2022-50236)

Summary: CVE-2022-50236 kernel: iommu/mediatek: Fix crash on isr after kexec()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-09-15 15:03:59 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iommu/mediatek: Fix crash on isr after kexec()

If the system is rebooted via isr(), the IRQ handler might
be triggered before the domain is initialized. Resulting on
an invalid memory access error.

Fix:
[    0.500930] Unable to handle kernel read from unreadable memory at virtual address 0000000000000070
[    0.501166] Call trace:
[    0.501174]  report_iommu_fault+0x28/0xfc
[    0.501180]  mtk_iommu_isr+0x10c/0x1c0

[ joro: Fixed spelling in commit message ]
Comment 1 Keith Grant 2025-09-15 19:06:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091547-CVE-2022-50236-dc41@gregkh/T