What is CVE-2026-64221?

CVE-2026-64221 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 4.12 onward and patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-64221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64221?

CVE-2026-64221 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64221?

Yes, CVE-2026-64221 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 4.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64221 actively exploited?

CVE-2026-64221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2026-64221

High

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.

Package Linux Kernel

Published 2026-07-24

Last modified 2026-08-11

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2026-64221 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.12 and later are affected. Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.142, 6.12.92, 6.18.34, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 4.12

Fixed in

✓ 5.10.258 5.10.x ✓ 5.15.209 5.15.x ✓ 6.1.175 6.1.x ✓ 6.6.142 6.6.x ✓ 6.12.92 6.12.x ✓ 6.18.34 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

8 total

Kernel Git
https://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e

Patch
Kernel Git
https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e

Patch
Kernel Git
https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6

Patch
Kernel Git
https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6

Patch
Kernel Git
https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-64221

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-07-24

Modified 2026-08-11

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64221?

CVE-2026-64221 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.12 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-64221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64221?

CVE-2026-64221 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64221?

Yes. CVE-2026-64221 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 4.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64221 actively exploited?

No. CVE-2026-64221 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.