Copyright © 2012 Red Hat, Inc. All rights reserved. Important 2026-07-25T00:00:00 kernel: spi: fsl-lpspi: terminate the RX channel on TX prepare failure path 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CWE-825

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.

A flaw was found in the Linux kernel's `fsl-lpspi` driver. This vulnerability occurs when the transmit (TX) Direct Memory Access (DMA) channel fails to prepare, but the receive (RX) DMA channel continues to operate. This can lead to memory corruption or a use-after-free condition, potentially allowing an attacker to compromise system integrity or execute unauthorized code.

Red Hat Enterprise Linux 10 Affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Affected kernel Red Hat Enterprise Linux 9 Affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-64303 https://nvd.nist.gov/vuln/detail/CVE-2026-64303 https://lore.kernel.org/linux-cve-announce/2026072507-CVE-2026-64303-7a2d@gregkh/T