What is CVE-2026-31553?

CVE-2026-31553 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.19 onward and patched in 6.19.11 and 7.0. CVE-2026-31553 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31553?

CVE-2026-31553 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Is there a patch available for CVE-2026-31553?

Yes, CVE-2026-31553 has been patched. Fixed versions include 6.19.11 and 7.0. 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-2026-31553 actively exploited?

CVE-2026-31553 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31553

High

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc() Using "(u64 __user *)hva + offset" to get the virtual addresses of S1/S2 descriptors looks really wrong, if offset is not zero. What we want to get for swapping is hva + offset, not hva + offset*8. ;-) Fix it.

Package Linux Kernel

Published 2026-04-24

Last modified 2026-04-27

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.19 and later are affected. Fixed in 6.19.11, 7.0 and their respective stable series.

Affected from

≥ 6.19

Fixed in

✓ 6.19.11 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31553 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0496acc42fb51eee040b5170cec05cec41385540
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4307e05e568782fc92eff651b09ee5dee88a058d
Patch

Details

CVE ID CVE-2026-31553

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-04-24

Modified 2026-04-27

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31553?

CVE-2026-31553 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.19 onward and has been patched in 6.19.11 and 7.0. CVE-2026-31553 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31553?

CVE-2026-31553 has a CVSS score of 8.8 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:C/C:H/I:H/A:H.
Is there a patch available for CVE-2026-31553?

Yes — CVE-2026-31553 has been patched. Fixed versions include 6.19.11 and 7.0. 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-2026-31553 actively exploited?

No — CVE-2026-31553 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.