iommu/msm: Unwind probe state on registration failure
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.112, 6.18.50, 7.2.4, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 6 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89452
- 2026-10-03 Alias added: GHSA-g6rr-fv4f-cc2j
- 2026-10-03 Fix available: Linux/Linux@51e37f9179387b6e3fa64a3d3b4fece1a38b3a02, Linux/[email protected] · CNA
- 2026-10-03 1 new reference · CNA
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@6a1ae472113762f794682229a0f233f1ee0f69a4 · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-30 Fix available: Linux/Linux@51424c14dbdadc8c2ad4abf842265a50f69d78aa, Linux/[email protected] · CNA
- 2026-10-30 1 new reference · CNA
- 2026-10-30 Affected versions changed · Red Hat
References
Other 6
- https://git.kernel.org/stable/c/51424c14dbdadc8c2ad4abf842265a50f69d78aa
- https://git.kernel.org/stable/c/6a1ae472113762f794682229a0f233f1ee0f69a4
- https://git.kernel.org/stable/c/51e37f9179387b6e3fa64a3d3b4fece1a38b3a02
- https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa
- https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c
- https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4
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Sources
- CVE-2026-89452 · CVE Program
- CVE-2026-89452 · NVD
- FIRST EPSS
- GHSA-g6rr-fv4f-cc2j · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89452 · Red Hat security data · CC BY 4.0
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