What is CVE-2026-53020?

CVE-2026-53020 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Race Condition flaw (CWE-362), affecting Linux kernel versions from 6.19 onward and patched in 7.0.10 and 7.1. CVE-2026-53020 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53020?

CVE-2026-53020 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-2026-53020?

Yes, CVE-2026-53020 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-2026-53020 actively exploited?

CVE-2026-53020 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2026-53020

High

In the Linux kernel, the following vulnerability has been resolved: um: Fix potential race condition in TLB sync During the TLB sync, we need to traverse and modify the page table, so we should hold the page table lock. Since full SMP support for threads within the same process is still missing, let's disable the split page table lock for simplicity.

Package Linux Kernel

Published 2026-06-24

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-362

CVE-2026-53020 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. 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/102331b66bcaf1f41f50b9c4cd5c36e46bafa9f3

Patch
Kernel Git
https://git.kernel.org/stable/c/f21c343ec7419377bff89ab11146c03ae117036f

Patch

Details

CVE ID CVE-2026-53020

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-24

Modified 2026-07-15

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53020?

CVE-2026-53020 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Race Condition flaw (CWE-362) . It affects Linux kernel versions from 6.19 onward and has been patched in 7.0.10 and 7.1. CVE-2026-53020 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53020?

CVE-2026-53020 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-2026-53020?

Yes. CVE-2026-53020 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-2026-53020 actively exploited?

No. CVE-2026-53020 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.