What is CVE-2026-53286?

CVE-2026-53286 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.17 onward and patched in 6.18.33, 7.0.10 and 7.1. CVE-2026-53286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53286?

CVE-2026-53286 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-2026-53286?

Yes, CVE-2026-53286 has been patched. Fixed versions include 6.18.33, 7.0.10 and 7.1. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53286 actively exploited?

CVE-2026-53286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53286

High

In the Linux kernel, the following vulnerability has been resolved: idpf: fix double free and use-after-free in aux device error paths When auxiliary_device_add() fails in idpf_plug_vport_aux_dev() or idpf_plug_core_aux_dev(), the err_aux_dev_add label calls auxiliary_device_uninit() and falls through to err_aux_dev_init. The uninit call will trigger put_device(), which invokes the release callback (idpf_vport_adev_release / idpf_core_adev_release) that frees iadev. The fall-through then reads adev->id from the freed iadev for ida_free() and double-frees iadev with kfree(). Free the IDA slot and clear the back-pointer before uninit, while adev is still valid, then return immediately. Commit 65637c3a1811 ("idpf: fix UAF in RDMA core aux dev deinitialization") fixed the same use-after-free in the matching unplug path in this file but missed both probe error paths.

Package Linux Kernel

Published 2026-06-26

Last modified 2026-07-08

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-415

CVE-2026-53286 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.17 and later are affected. Fixed in 6.18.33, 7.0.10, 7.1 and their respective stable series.

Affected from

≥ 6.17

Fixed in

✓ 6.18.33 6.18.x ✓ 7.0.10 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/6c77b9510829a424d1b74409b7db9456e3522871

Patch
Kernel Git
https://git.kernel.org/stable/c/722b91d5086a249318c9d0e2b36aeac80ba8c808

Patch
Kernel Git
https://git.kernel.org/stable/c/f319de7074e1728a9f9ff7134257360c694ec2b2

Patch

Details

CVE ID CVE-2026-53286

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-26

Modified 2026-07-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53286?

CVE-2026-53286 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.17 onward and has been patched in 6.18.33, 7.0.10 and 7.1. CVE-2026-53286 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53286?

CVE-2026-53286 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-2026-53286?

Yes. CVE-2026-53286 has been patched. Fixed versions include 6.18.33, 7.0.10 and 7.1. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53286 actively exploited?

No. CVE-2026-53286 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.