CVE-2022-50482 Details
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Clean up si_domain in the init_dmars() error path A splat from kmem_cache_destroy() was seen with a kernel prior to commit ee2653bbe89d ("iommu/vt-d: Remove domain and devinfo mempool") when there was a failure in init_dmars(), because the iommu_domain cache still had objects. While the mempool code is now gone, there still is a leak of the si_domain memory if init_dmars() fails. So clean up si_domain in the init_dmars() error path.
A memory leak vulnerability has been identified in the Linux kernel's IOMMU (Input-Output Memory Management Unit) handling, specifically within the VT-d (Virtualization Technology for Directed I/O) context. This issue affects several versions of the Linux kernel prior to a specific commit that removed the domain and device information memory pool. The vulnerability arises in the 'si_domain' initialization process, where a failure can lead to residual objects in the IOMMU domain cache. Although the problematic memory pool code has been removed, the 'si_domain' memory can still leak if the initialization fails. The vulnerability is triggered during the IOMMU domain setup process, where improper error handling allows memory to remain allocated without being properly released.
Users can upgrade to a patched version of the Linux kernel that addresses this vulnerability. The latest stable version can be obtained from the official Linux kernel website or through the Linux distribution's package manager.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0365d6af75f9f2696e94a0fef24a2c8464c037c8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5cecfe151874b835331efe086bbdcaeaf64f6b90 | kernel.org | Patch |
| https://git.kernel.org/stable/c/620bf9f981365c18cc2766c53d92bf8131c63f32 | kernel.org | Patch |
| https://git.kernel.org/stable/c/724483b585a1b1e063d42ac5aa835707ff2ec165 | kernel.org | Patch |
| https://git.kernel.org/stable/c/749bea542b67513e99240dc58bbfc099e842d508 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c4ad3ae4c6be9d8b0701761c839771116bca6ea3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d74196bb278b8f8af88e16bd595997dfa3d6fdb0 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-908 | Use of Uninitialized Resource | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.2, < 4.14.298 >= 4.15, < 4.19.264 >= 4.20, < 5.4.221 >= 5.5, < 5.10.152 >= 5.11, < 5.15.76 >= 5.16, < 6.0.6 6.1 rc1 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jan 23, 2026 | Initial Analysis | [email protected] |
| Oct 4, 2025 | New CVE Received | kernel.org |