What is CVE-2026-31471?

CVE-2026-31471 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.14 onward and patched in 6.18.21, 6.19.11 and 7.0. CVE-2026-31471 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31471?

CVE-2026-31471 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-2026-31471?

Yes, CVE-2026-31471 has been patched. Fixed versions include 6.18.21, 6.19.11 and 7.0. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31471 actively exploited?

CVE-2026-31471 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31471

High

In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: only publish mode_data after clone setup iptfs_clone_state() stores x->mode_data before allocating the reorder window. If that allocation fails, the code frees the cloned state and returns -ENOMEM, leaving x->mode_data pointing at freed memory. The xfrm clone unwind later runs destroy_state() through x->mode_data, so the failed clone path tears down IPTFS state that clone_state() already freed. Keep the cloned IPTFS state private until all allocations succeed so failed clones leave x->mode_data unset. The destroy path already handles a NULL mode_data pointer.

Package Linux Kernel

Published 2026-04-22

Last modified 2026-05-06

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-415

CVE-2026-31471 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.14 and later are affected. Fixed in 6.18.21, 6.19.11, 7.0 and their respective stable series.

Affected from

≥ 6.14

Fixed in

✓ 6.18.21 6.18.x ✓ 6.19.11 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31471 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/371a43c4ac70cac0de9f9b1fc5b1660b9565b9f1
Patch
Kernel patch commit
https://git.kernel.org/stable/c/5784a1e2889c9525a8f036cb586930e232170bf7
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d849a2f7309fc0616e79d13b008b0a47e0458b6e
Patch

Details

CVE ID CVE-2026-31471

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-04-22

Modified 2026-05-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31471?

CVE-2026-31471 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.14 onward and has been patched in 6.18.21, 6.19.11 and 7.0. CVE-2026-31471 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31471?

CVE-2026-31471 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-2026-31471?

Yes — CVE-2026-31471 has been patched. Fixed versions include 6.18.21, 6.19.11 and 7.0. If you are running Linux kernel 6.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31471 actively exploited?

No — CVE-2026-31471 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.