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Review reviewHigh

CVE-2026-64221

Linux

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
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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.

Affected product and versions

Product
Linux
Affected versions
>= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < 9c6f306a8140962c7284197db54b96fdb5f468d6, >= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < 3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6, >= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < d6f422b122922d1abee907d673bcc990e5f3672d, >= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < f2dc841d7dc9063fe9b47ced869b1271e55052ae, >= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < 1cd927002120678bd5d23c760246639caa53040e, >= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < d7a076fb596c7b408ed6df74793a597990a6d860, >= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < 178b9b570c0f75fa7e691490520328b20d19138e, >= c687c46e9e4527c4b4d82bc3cca58c1b08bcfb83 < ea6ec3343e05f7937a53eb6d7617b3abdb4abc19, >= 4.12
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2026-64221 — Linux | SECUFOCUS NOW