In the Linux kernel, the following vulnerability has been resolved: spi: sprd: fix error pointer deref after DMA setup failure The driver falls back… (CVE-2026-64168)
A vulnerability in the Linux kernel's spi: sprd driver involved an error pointer dereference after a DMA setup failure during probe. The driver attempts to fall back to PIO mode if DMA setup fails, but did not properly check the dma.enabled flag before releasing DMA channels on late probe errors, leading to potential dereferencing of an error pointer or double release of a DMA channel. This issue has been resolved in the Linux kernel.
AI Analysis
Technical Summary
The Linux kernel spi: sprd driver contained a vulnerability where, after a DMA setup failure during device probe, the driver would fall back to PIO mode but failed to verify the dma.enabled flag before releasing DMA channels on late probe errors. This could cause dereferencing of an error pointer or attempting to release a DMA channel twice. The flaw was identified during a review of a devres allocation conversion patch and has been fixed.
Potential Impact
The vulnerability could lead to kernel errors such as dereferencing invalid pointers or double releasing DMA channels, potentially causing system instability or crashes. No known exploits in the wild have been reported. The impact is limited to kernel stability and reliability rather than direct privilege escalation or data compromise based on the available information.
Mitigation Recommendations
The vulnerability has been resolved in the Linux kernel. Users should update to the fixed kernel version containing the patch for CVE-2026-64168 when it becomes available. Patch status is not yet confirmed from vendor advisory; check the official Linux kernel release notes or advisories for the exact fixed versions and apply updates accordingly.
In the Linux kernel, the following vulnerability has been resolved: spi: sprd: fix error pointer deref after DMA setup failure The driver falls back… (CVE-2026-64168)
Description
A vulnerability in the Linux kernel's spi: sprd driver involved an error pointer dereference after a DMA setup failure during probe. The driver attempts to fall back to PIO mode if DMA setup fails, but did not properly check the dma.enabled flag before releasing DMA channels on late probe errors, leading to potential dereferencing of an error pointer or double release of a DMA channel. This issue has been resolved in the Linux kernel.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel spi: sprd driver contained a vulnerability where, after a DMA setup failure during device probe, the driver would fall back to PIO mode but failed to verify the dma.enabled flag before releasing DMA channels on late probe errors. This could cause dereferencing of an error pointer or attempting to release a DMA channel twice. The flaw was identified during a review of a devres allocation conversion patch and has been fixed.
Potential Impact
The vulnerability could lead to kernel errors such as dereferencing invalid pointers or double releasing DMA channels, potentially causing system instability or crashes. No known exploits in the wild have been reported. The impact is limited to kernel stability and reliability rather than direct privilege escalation or data compromise based on the available information.
Mitigation Recommendations
The vulnerability has been resolved in the Linux kernel. Users should update to the fixed kernel version containing the patch for CVE-2026-64168 when it becomes available. Patch status is not yet confirmed from vendor advisory; check the official Linux kernel release notes or advisories for the exact fixed versions and apply updates accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5w89-7hjx-x8fr
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64168"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27a82a4a8d598912a874
Added to database: 07/19/2026, 19:38:16 UTC
Last enriched: 07/19/2026, 19:42:24 UTC
Last updated: 07/20/2026, 17:26:47 UTC
Views: 13
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