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Vulnerability record · CVE-2026-64221 · published 24 July 2026

CVE-2026-64221: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.17% · top 94.2% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
11 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/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/178b9b570c0f75fa7e691490520328b20d19138e Patch
https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e Patch
https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6 Patch
https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6 Patch
https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d Patch
https://git.kernel.org/stable/c/d7a076fb596c7b408ed6df74793a597990a6d860 Patch
https://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19 Patch
https://git.kernel.org/stable/c/f2dc841d7dc9063fe9b47ced869b1271e55052ae Patch

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Source: NIST National Vulnerability Database (record CVE-2026-64221), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.