Riskcovery

CVE-2026-93205

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

State
Published
Severity
Not scored
Published
Sep 24, 2026
Updated
Oct 30, 2026
Reserved
Sep 17, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 395ad89d11fd93f79a6b942e91fc409807a63c4b to before 041b5e2a2a31c62049af30c5716099eebab86cb8Affected
  • 395ad89d11fd93f79a6b942e91fc409807a63c4b to before 64b1a9384db9cabf1bde378a2d5c1923fd67ea0dAffected
  • 395ad89d11fd93f79a6b942e91fc409807a63c4b to before 981686f4137760a16a03c5193f11d85133533f93Affected
  • 395ad89d11fd93f79a6b942e91fc409807a63c4b to before 2235eafda9b3df9295efd0593cd4a8977440c3f6Affected
  • 395ad89d11fd93f79a6b942e91fc409807a63c4b to before 78fd5a2d65f3546cb4285f8e52f445baecbd00e0Affected
  • 395ad89d11fd93f79a6b942e91fc409807a63c4b to before 2bd22a0d40503a65d243b011de146603c8ce1cbcAffected
LinuxLinux
  • 5.14Affected
  • before 5.14Not affected
  • 6.1.191 through 6.1.*Not affected
  • 6.6.160 through 6.6.*Not affected
  • 6.12.109 through 6.12.*Not affected
  • 6.18.50 through 6.18.*Not affected
  • 7.2.4 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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