In the Linux kernel, the following vulnerability has been resolved: spi: ep93xx: fix error pointer deref after DMA setup failure The driver falls… (CVE-2026-64169)
A vulnerability in the Linux kernel's spi: ep93xx driver could lead to a null pointer dereference after a DMA setup failure. The driver attempts to fall back to PIO mode if DMA setup fails during probe, but failing to clear DMA channel pointers on setup failure may cause dereferencing of an error pointer during later probe errors or driver unbind. This issue has been fixed in the Linux kernel.
AI Analysis
Technical Summary
The Linux kernel spi: ep93xx driver contained a flaw where, if DMA setup failed during device probe, the driver would fall back to PIO mode but did not clear DMA channel pointers properly. This could result in dereferencing an error pointer later during probe errors or driver unbind, causing a null pointer dereference (CWE-476). The issue was identified during a devres allocation conversion patch review and has been resolved.
Potential Impact
The vulnerability can cause a denial of service due to a null pointer dereference leading to kernel instability or crash. There is no impact on confidentiality or integrity. The CVSS v3.1 score is 5.5 (medium severity), with attack vector local, low attack complexity, low privileges required, no user interaction, unchanged scope, and no confidentiality or integrity impact but high availability impact.
Mitigation Recommendations
A fix has been applied in the Linux kernel to clear DMA channel pointers on DMA setup failure in the spi: ep93xx driver. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the Linux kernel vendor advisory or source repository for the specific fixed version and apply the update accordingly.
In the Linux kernel, the following vulnerability has been resolved: spi: ep93xx: fix error pointer deref after DMA setup failure The driver falls… (CVE-2026-64169)
Description
A vulnerability in the Linux kernel's spi: ep93xx driver could lead to a null pointer dereference after a DMA setup failure. The driver attempts to fall back to PIO mode if DMA setup fails during probe, but failing to clear DMA channel pointers on setup failure may cause dereferencing of an error pointer during later probe errors or driver unbind. This issue has been fixed in the Linux kernel.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel spi: ep93xx driver contained a flaw where, if DMA setup failed during device probe, the driver would fall back to PIO mode but did not clear DMA channel pointers properly. This could result in dereferencing an error pointer later during probe errors or driver unbind, causing a null pointer dereference (CWE-476). The issue was identified during a devres allocation conversion patch review and has been resolved.
Potential Impact
The vulnerability can cause a denial of service due to a null pointer dereference leading to kernel instability or crash. There is no impact on confidentiality or integrity. The CVSS v3.1 score is 5.5 (medium severity), with attack vector local, low attack complexity, low privileges required, no user interaction, unchanged scope, and no confidentiality or integrity impact but high availability impact.
Mitigation Recommendations
A fix has been applied in the Linux kernel to clear DMA channel pointers on DMA setup failure in the spi: ep93xx driver. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; check the Linux kernel vendor advisory or source repository for the specific fixed version and apply the update accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pcrr-27fc-3phm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64169"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27a82a4a8d598912a213
Added to database: 07/19/2026, 19:38:16 UTC
Last enriched: 08/13/2026, 19:12:09 UTC
Last updated: 09/01/2026, 22:52:13 UTC
Views: 50
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