What is CVE-2026-53148?

CVE-2026-53148 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Out-of-bounds Write flaw (CWE-787), affecting Linux kernel versions from 4.15 onward and patched in 5.10.259, 5.15.210, 6.1.176 and others. CVE-2026-53148 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53148?

CVE-2026-53148 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-2026-53148?

Yes, CVE-2026-53148 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-2026-53148 actively exploited?

CVE-2026-53148 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/787.html

CVE-2026-53148

High

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Clamp XDomain response data copy to allocation size tb_xdp_properties_request() derives the per-packet copy length from the response header without checking that it fits in the previously allocated data buffer. A malicious peer can set its length field larger than the declared data_length, causing memcpy to write past the kcalloc allocation. Clamp the per-packet copy length so that the cumulative offset never exceeds data_len.

Package Linux Kernel

Published 2026-06-25

Last modified 2026-07-15

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-787

CVE-2026-53148 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

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

11 total

Kernel Git
https://git.kernel.org/stable/c/05a43157676c243c248d1c6d9dcecbe6eba2f35d

Patch
Kernel Git
https://git.kernel.org/stable/c/0b334279a82d79fb4723bd4f614305de1ab69caa

Patch
Kernel Git
https://git.kernel.org/stable/c/322e93448d908434ae5545660fcbe8f5a7a8e141

Patch
Kernel Git
https://git.kernel.org/stable/c/5db10c8ad8c09f72c847dfeef3d876098257f505

Patch
Kernel Git
https://git.kernel.org/stable/c/6021d39ccd979713b39b980286020d8f9a45efd1

Patch

Showing 5 of 11 references View all on NVD

Details

CVE ID CVE-2026-53148

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-25

Modified 2026-07-15

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53148?

CVE-2026-53148 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . 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-2026-53148 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53148?

CVE-2026-53148 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-2026-53148?

Yes. CVE-2026-53148 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-2026-53148 actively exploited?

No. CVE-2026-53148 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.