CVE-2026-93205

Summary

In the Linux kernel, the following vulnerability has been resolved:

iommu/arm-smmu-v3: Manage teardown with devm

arm_smmu_device_remove() manually frees the IOPF queue, destroys the vmid_map and disables the device, while the IRQs and queues are devm managed. devm unwinds only after remove() returns, so the cleanup runs in the wrong order. The IOPF queue is freed before the event-queue IRQ whose handler uses it.

Manage all of it with devm so the unwind order is correct. Free the IOPF queue and vmid_map via devm actions, and disable the device from one registered after arm_smmu_device_reset().

This is also a prerequisite for fixing a Tegra241 CMDQV CMD_SYNC use-after-free in the subsequent patch.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 981686f4137760a16a03c5193f11d85133533f93affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2235eafda9b3df9295efd0593cd4a8977440c3f6affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 78fd5a2d65f3546cb4285f8e52f445baecbd00e0affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2bd22a0d40503a65d243b011de146603c8ce1cbcaffected
LinuxLinux0 < 6.12.109affected
LinuxLinux0 < 6.18.50affected
LinuxLinux0 < 7.2.4affected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References