What is CVE-2026-31606?

CVE-2026-31606 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 3.19 onward and patched in 6.12.83, 6.18.24, 6.19.14 and others. CVE-2026-31606 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31606?

CVE-2026-31606 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-31606?

Yes, CVE-2026-31606 has been patched. Fixed versions include 6.12.83, 6.18.24, 6.19.14 and others. If you are running Linux kernel 3.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31606 actively exploited?

CVE-2026-31606 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31606

Medium

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: don't call cdev_init while cdev in use When calling unbind, then bind again, cdev_init reinitialized the cdev, even though there may still be references to it. That's the case when the /dev/hidg* device is still opened. This obviously unsafe behavior like oopes. This fixes this by using cdev_alloc to put the cdev on the heap. That way, we can simply allocate a new one in hidg_bind.

Package Linux Kernel

Published 2026-04-24

Last modified 2026-04-29

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 3.19 and later are affected. Fixed in 6.12.83, 6.18.24, 6.19.14, 7.0.1, 7.1-rc1 and their respective stable series.

Affected from

≥ 3.19

Fixed in

✓ 6.12.83 6.12.x ✓ 6.18.24 6.18.x ✓ 6.19.14 6.19.x ✓ 7.0.1 7.0.x ✓ 7.1-rc1

References

The following references provide additional information about CVE-2026-31606 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/5a229016ca3ac551294ec59770be9da94ec4bf63
Patch
Kernel patch commit
https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123
Patch
Kernel patch commit
https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2026-31606

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-04-24

Modified 2026-04-29

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31606?

CVE-2026-31606 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.19 onward and has been patched in 6.12.83, 6.18.24, 6.19.14 and others. CVE-2026-31606 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31606?

CVE-2026-31606 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-31606?

Yes — CVE-2026-31606 has been patched. Fixed versions include 6.12.83, 6.18.24, 6.19.14 and others. If you are running Linux kernel 3.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31606 actively exploited?

No — CVE-2026-31606 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.