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Vulnerability record · CVE-2026-64303 · published 25 July 2026

CVE-2026-64303: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.69% · top 49.0% CWE-416 · Use after free
9.8CVSS 3.1 base score
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
3 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/01980b5da56e573d62798d0ff6c86bcaa2b22cbe Patch
https://git.kernel.org/stable/c/808033d80d5c9f8adf7e8de9317389270ce13430 Patch
https://git.kernel.org/stable/c/9d000bdd250d649a11cd7f733175686877344582 Patch
https://git.kernel.org/stable/c/ad370d1c7a9a832f77b2341513cd31188c9443af Patch
https://git.kernel.org/stable/c/af39a2698f69b584d14a00cffe0f51a2caa15337 Patch
https://git.kernel.org/stable/c/cce2063404b2341e7b2bbf85eddfcd70a31a0033 Patch
https://git.kernel.org/stable/c/d5c1060218a3749c8a18b36f8169d910fce20639 Patch
https://git.kernel.org/stable/c/e65505d91fa036a238968e4c10744244d1b968c4 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-64303), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.