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CVE-2026-64303

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: spi: fsl-lpspi: terminate the RX channel on TX prepare failure path When dmaengine_prep_slave_sg() fails for the TX channel, th…

Published Jul 25, 2026EPSS 0.69%

Overview

CVE-2026-64303 is a critical-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

spi: fsl-lpspi: terminate the RX channel on TX prepare failure path

When dmaengine_prep_slave_sg() fails for the TX channel, the error path

terminates the TX DMA channel but leaves the RX channel running. Since

the RX channel was already submitted and issued prior to preparing

the TX descriptor, returning -EINVAL causes the SPI core to unmap the

DMA buffers while the RX DMA engine continues writing to them, leading

to potential memory corruption or use-after-free.

Terminate the RX channel before returning on the TX prepare failure path.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/01980b5da56e573d62798d0ff6c86bcaa2b22cbeRefgit.kernel.org/stable/c/808033d80d5c9f8adf7e8de9317389270ce13430Refgit.kernel.org/stable/c/9d000bdd250d649a11cd7f733175686877344582Refgit.kernel.org/stable/c/ad370d1c7a9a832f77b2341513cd31188c9443afRefgit.kernel.org/stable/c/af39a2698f69b584d14a00cffe0f51a2caa15337Refgit.kernel.org/stable/c/cce2063404b2341e7b2bbf85eddfcd70a31a0033Refgit.kernel.org/stable/c/d5c1060218a3749c8a18b36f8169d910fce20639Refgit.kernel.org/stable/c/e65505d91fa036a238968e4c10744244d1b968c4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64303?

CVE-2026-64303 is a critical-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-64303?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-64303?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64303?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64303 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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