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CVE-2026-43250
Description
A flaw was found in the Linux kernel's ChipIdea USB Device Controller (UDC) driver. A local user with a malicious USB device, or a malicious USB device itself, could exploit this by reconnecting the device during an active data transfer. This improper cleanup of Direct Memory Access (DMA) buffers can lead to the reuse of stale DMA states. Consequently, this can result in memory corruption, potentially causing system instability, crashes, or even arbitrary code execution.
- Bugzilla 2467066: kernel: usb: chipidea: udc: fix DMA and SG cleanup in _ep_nuke()
- CWE-459: Incomplete Cleanup
Frequently Asked Questions
For more information, see https://access.redhat.com/solutions/762393.
- "Under investigation" doesn't necessarily mean that the product is affected by this vulnerability. It only means that our Analysis Team is still working on determining whether the product is affected and how it is affected.
- The term 'Affected' means that our Analysis team has determined that this product, such as Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to address this issue in the near future. This includes all minor releases of this product unless noted otherwise in the Statement text.
Available options depend mostly on the Impact of the vulnerability and the current Life Cycle phase of your product. Overall, you have the following options:
- Upgrade to a supported product version that includes a fix for this vulnerability (recommended).
- Apply a mitigation (if one exists).
- Customers with the Technical Account Manager (TAM) RHEL Security Select Add-on can review this CVE directly with their TAM.
Available options depend mostly on the Impact of the vulnerability and the current Life Cycle phase of your product. Overall, you have the following options:
- Apply a mitigation (if one exists).
- Red Hat Engineering focuses on addressing high-priority issues based on the impact and product lifecycle expectations. Therefore, lower-priority issues will not receive immediate fixes.
- Customers with the technical account manager (TAM) RHEL Security Select Add-on can review this CVE directly with their TAM.
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