What is CVE-2026-53116?

CVE-2026-53116 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 6.19 onward and patched in 7.0.10 and 7.1. CVE-2026-53116 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53116?

CVE-2026-53116 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-2026-53116?

Yes, CVE-2026-53116 has been patched. Fixed versions include 7.0.10 and 7.1. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53116 actively exploited?

CVE-2026-53116 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-2026-53116

High

In the Linux kernel, the following vulnerability has been resolved: s390/ap: use generic driver_override infrastructure When the AP masks are updated via apmask_store() or aqmask_store(), ap_bus_revise_bindings() is called after ap_attr_mutex has been released. This calls __ap_revise_reserved(), which accesses the driver_override field without holding any lock, racing against a concurrent driver_override_store() that may free the old string, resulting in a potential UAF. Fix this by using the driver-core driver_override infrastructure, which protects all accesses with an internal spinlock. Note that unlike most other buses, the AP bus does not check driver_override in its match() callback; the override is checked in ap_device_probe() and __ap_revise_reserved() instead. Also note that we do not enable the driver_override feature of struct bus_type, as AP - in contrast to most other buses - passes "" to sysfs_emit() when the driver_override pointer is NULL. Thus, printing "\n" instead of "(null)\n". Additionally, AP has a custom counter that is modified in the corresponding custom driver_override_store().

Package Linux Kernel

Published 2026-06-24

Last modified 2026-07-23

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-2026-53116 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 6.19 and later are affected. Fixed in 7.0.10, 7.1 and their respective stable series.

Affected from

≥ 6.19

Fixed in

✓ 7.0.10 7.0.x ✓ 7.1

References

2 total

Kernel Git
https://git.kernel.org/stable/c/81d6f7c3a70b10ff757ee8b5f8114a190871cf1e

Patch
Kernel Git
https://git.kernel.org/stable/c/8f2eca0570438b94602da1297353eb7b10dcb6cb

Patch

Details

CVE ID CVE-2026-53116

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-24

Modified 2026-07-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53116?

CVE-2026-53116 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 6.19 onward and has been patched in 7.0.10 and 7.1. CVE-2026-53116 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53116?

CVE-2026-53116 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-2026-53116?

Yes. CVE-2026-53116 has been patched. Fixed versions include 7.0.10 and 7.1. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53116 actively exploited?

No. CVE-2026-53116 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.