# CVE-2026-89452: linux: In the Linux kernel, the following vulnerability has been resolved:  iommu/msm: Unwind probe state on registration fa...

CVE-2026-89452 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-89452, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-89452
- Priority: High
- CVSS: 8.4 (high)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 11, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  iommu/msm: Unwind probe state on registration failure  msm_iommu_probe() adds its devm-managed IOMMU object to qcom_iommu_devices before adding the IOMMU sysfs device and registering it with the IOMMU core.  If iommu_device_sysfs_add() fails, probe returns with the object still on qcom_iommu_devices. The driver core then releases the devm allocation, leaving a dangling list entry that later list walks may dereference.  If iommu_device_register() fails, the same dangling list entry remains and the sysfs device is left registered as well.  Unwind the sysfs device and global list entry in reverse setup order on the corresponding failure paths.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.113-1 | [DEBIAN-CVE-2026-89452](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89452.md) | Sep 23, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89452](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89452.md) | Sep 23, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.113-1~deb12u1 | [DEBIAN-CVE-2026-89452](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89452.md) | Sep 23, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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