Vulnerability 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 Score
CRITICAL
References
- https://git.kernel.org/stable/c/01980b5da56e573d62798d0ff6c86bcaa2b22cbe
- https://git.kernel.org/stable/c/808033d80d5c9f8adf7e8de9317389270ce13430
- https://git.kernel.org/stable/c/9d000bdd250d649a11cd7f733175686877344582
- https://git.kernel.org/stable/c/ad370d1c7a9a832f77b2341513cd31188c9443af
- https://git.kernel.org/stable/c/af39a2698f69b584d14a00cffe0f51a2caa15337
- https://git.kernel.org/stable/c/cce2063404b2341e7b2bbf85eddfcd70a31a0033
- https://git.kernel.org/stable/c/d5c1060218a3749c8a18b36f8169d910fce20639
- https://git.kernel.org/stable/c/e65505d91fa036a238968e4c10744244d1b968c4
FAQ
What is CVE-2026-64303?
CVE-2026-64303 is a vulnerability with a CVSS score of 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, the e...
How severe is CVE-2026-64303?
CVE-2026-64303 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-64303?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.