What is CVE-2026-53110?

CVE-2026-53110 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.3 onward and patched in 6.6.141, 6.12.91, 6.18.33 and others. CVE-2026-53110 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53110?

CVE-2026-53110 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-2026-53110?

Yes, CVE-2026-53110 has been patched. Fixed versions include 6.6.141, 6.12.91, 6.18.33 and others. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53110 actively exploited?

CVE-2026-53110 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53110

High

In the Linux kernel, the following vulnerability has been resolved: s390/bpf: Zero-extend bpf prog return values and kfunc arguments s390x ABI requires callers to zero-extend unsigned arguments and sign-extend signed arguments, and callees to zero-extend unsigned return values and sign-extend signed return values. s390 BPF JIT currently implements only sign extension. Fix this omission and implement zero extension too.

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

Affected versions

Linux kernel versions 6.3 and later are affected. Fixed in 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1 and their respective stable series.

Affected from

≥ 6.3

Fixed in

✓ 6.6.141 6.6.x ✓ 6.12.91 6.12.x ✓ 6.18.33 6.18.x ✓ 7.0.10 7.0.x ✓ 7.1

References

5 total

Kernel Git
https://git.kernel.org/stable/c/202e42e4aa890172366354b233c42c73107a3f59

Patch
Kernel Git
https://git.kernel.org/stable/c/366b0e05ee24f5ba62bdc7ec1346038258b9a797

Patch
Kernel Git
https://git.kernel.org/stable/c/44c4f999b03f55debb1a0c5ab5c1796895a1adf8

Patch
Kernel Git
https://git.kernel.org/stable/c/834918a77be51419383bf1dda9f02b81ecf26b34

Patch
Kernel Git
https://git.kernel.org/stable/c/edc90a12073b9a530064a99945c183dde120cb99

Patch

Details

CVE ID CVE-2026-53110

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-2026-53110?

CVE-2026-53110 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.3 onward and has been patched in 6.6.141, 6.12.91, 6.18.33 and others. CVE-2026-53110 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53110?

CVE-2026-53110 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-2026-53110?

Yes. CVE-2026-53110 has been patched. Fixed versions include 6.6.141, 6.12.91, 6.18.33 and others. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53110 actively exploited?

No. CVE-2026-53110 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.