What is CVE-2026-53270?

CVE-2026-53270 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 3.18.23 onward and patched in 5.10.259, 5.15.210, 6.1.176 and others. CVE-2026-53270 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53270?

CVE-2026-53270 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-2026-53270?

Yes, CVE-2026-53270 has been patched. Fixed versions include 5.10.259, 5.15.210, 6.1.176 and others. If you are running Linux kernel 3.18.23 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53270 actively exploited?

CVE-2026-53270 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53270

High

In the Linux kernel, the following vulnerability has been resolved: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->scheduler ptr after the scheduler module initiates RCU callbacks. This can cause packets to use the old scheduler at the time when svc->sched_data is already freed after RCU grace period. Fix it by clearing the ptr early in ip_vs_unbind_scheduler(), before the done_service method schedules any RCU callbacks. Also, if the new scheduler fails to initialize when replacing the old scheduler, try to restore the old scheduler while still returning the error code.

Package Linux Kernel

Published 2026-06-25

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

Affected versions

Linux kernel versions 3.18.23, 4.1.11, 4.2 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

≥ 3.18.23 ≥ 4.1.11 ≥ 4.2

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/14e4689c113b4c06af1069364ade24fdd7055f33

Patch
Kernel Git
https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b

Patch
Kernel Git
https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03

Patch
Kernel Git
https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3

Patch
Kernel Git
https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-53270

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-25

Modified 2026-07-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53270?

CVE-2026-53270 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 3.18.23 onward and has been patched in 5.10.259, 5.15.210, 6.1.176 and others. CVE-2026-53270 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53270?

CVE-2026-53270 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-2026-53270?

Yes. CVE-2026-53270 has been patched. Fixed versions include 5.10.259, 5.15.210, 6.1.176 and others. If you are running Linux kernel 3.18.23 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53270 actively exploited?

No. CVE-2026-53270 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.