CVE-2026-64221 (CVSS 7.8)

Description

In the Linux kernel, the following vulnerability has been resolved: spi: ti-qspi: fix use-after-free after DMA setup failure The driver falls back to PIO mode if DMA setup fails during probe. Make sure to clear the DMA channel pointer also if buffer allocation fails to avoid passing a pointer to the released channel to the DMA engine (or trying to free the channel a second time on late probe errors or driver unbind). This issue was flagged by Sashiko when reviewing a devres allocation conversion patch.

Is your site exposed to CVE-2026-64221?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.8

HIGH

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

EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6 https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6 https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d https://git.kernel.org/stable/c/d7a076fb596c7b408ed6df74793a597990a6d860 https://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19 https://git.kernel.org/stable/c/f2dc841d7dc9063fe9b47ced869b1271e55052ae

Frequently Asked Questions

What is CVE-2026-64221? +

In the Linux kernel, the following vulnerability has been resolved: spi: ti-qspi: fix use-after-free after DMA setup failure The driver falls back to PIO mode if DMA setup fails during probe. Make sure to clear the DMA channel pointer also if buffer allocation fails to avoid passing a pointer to the released channel to the DMA engine (or trying to free the channel a second time on late probe errors or driver unbind). This issue was flagged by Sashiko when reviewing a devres allocation conversion patch. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-64221? +

CVE-2026-64221 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-64221? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-64221