What is CVE-2025-40364?

CVE-2025-40364 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.19 onward and patched in 6.1.129, 6.6.78, 6.12.14 and others. CVE-2025-40364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-40364?

CVE-2025-40364 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-2025-40364?

Yes, CVE-2025-40364 has been patched. Fixed versions include 6.1.129, 6.6.78, 6.12.14 and others. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-40364 actively exploited?

CVE-2025-40364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-40364

High

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix io_req_prep_async with provided buffers io_req_prep_async() can import provided buffers, commit the ring state by giving up on that before, it'll be reimported later if needed.

Package Linux Kernel

Published 2025-04-18

Last modified 2025-11-17

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

Affected versions

Linux kernel versions 5.19 and later are affected. Fixed in 6.1.129, 6.6.78, 6.12.14, 6.13.3, 6.14 and their respective stable series.

Affected from

≥ 5.19

Fixed in

✓ 6.1.129 6.1.x ✓ 6.6.78 6.6.x ✓ 6.12.14 6.12.x ✓ 6.13.3 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-40364 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/233b210a678bddf8b49b02a070074a52b87e6d43
Patch
Kernel patch commit
https://git.kernel.org/stable/c/35ae7910c349fb3c60439992e2e0e79061e95382
Patch
Kernel patch commit
https://git.kernel.org/stable/c/a1b17713b32c75a90132ea2f92b1257f3bbc20f3
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2025-40364

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-04-18

Modified 2025-11-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-40364?

CVE-2025-40364 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.19 onward and has been patched in 6.1.129, 6.6.78, 6.12.14 and others. CVE-2025-40364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-40364?

CVE-2025-40364 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-2025-40364?

Yes — CVE-2025-40364 has been patched. Fixed versions include 6.1.129, 6.6.78, 6.12.14 and others. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-40364 actively exploited?

No — CVE-2025-40364 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.