What is CVE-2026-53146?

CVE-2026-53146 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, affecting Linux kernel versions from 4.15 onward and patched in 5.10.259, 5.15.210, 6.1.176 and others. CVE-2026-53146 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53146?

CVE-2026-53146 has a CVSS score of 7.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

Is there a patch available for CVE-2026-53146?

Yes, CVE-2026-53146 has been patched. Fixed versions include 5.10.259, 5.15.210, 6.1.176 and others. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53146 actively exploited?

CVE-2026-53146 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53146

High

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Limit XDomain response copy to actual frame size tb_xdomain_copy() copies req->response_size bytes from the received packet buffer regardless of the actual frame size. When a short response arrives, this reads past the valid frame data in the DMA pool buffer into stale contents from previous transactions. Use the minimum of frame size and expected response size for the copy length.

Package Linux Kernel

Published 2026-06-25

Last modified 2026-07-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Vector string

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

Affected versions

Linux kernel versions 4.15 and later are affected. Fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1 and their respective stable series.

Affected from

≥ 4.15

Fixed in

✓ 5.10.259 5.10.x ✓ 5.15.210 5.15.x ✓ 6.1.176 6.1.x ✓ 6.6.143 6.6.x ✓ 6.12.94 6.12.x ✓ 6.18.36 6.18.x ✓ 7.0.13 7.0.x ✓ 7.1

References

8 total

Kernel Git
https://git.kernel.org/stable/c/033dfa63bf6be2653441a1dccae4a8313a91bb9d

Patch
Kernel Git
https://git.kernel.org/stable/c/4db2bd2ed4785dbadaeeab9f4e346b21ac5fb8eb

Patch
Kernel Git
https://git.kernel.org/stable/c/7720654b4842bcdfeb64bc002f6186041849e1e7

Patch
Kernel Git
https://git.kernel.org/stable/c/a15b6d3136accb2bf84b04d9a3ddd991f7fbf1cb

Patch
Kernel Git
https://git.kernel.org/stable/c/b2c1e5d9f1598cc1a4736d5c6bd1218f90805ee4

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-53146

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2026-06-25

Modified 2026-07-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53146?

CVE-2026-53146 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . It affects Linux kernel versions from 4.15 onward and has been patched in 5.10.259, 5.15.210, 6.1.176 and others. CVE-2026-53146 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53146?

CVE-2026-53146 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
Is there a patch available for CVE-2026-53146?

Yes. CVE-2026-53146 has been patched. Fixed versions include 5.10.259, 5.15.210, 6.1.176 and others. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53146 actively exploited?

No. CVE-2026-53146 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.