What is CVE-2026-31777?

CVE-2026-31777 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 2.6.31 onward and patched in 6.19.12 and 7.0. CVE-2026-31777 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31777?

CVE-2026-31777 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-2026-31777?

Yes, CVE-2026-31777 has been patched. Fixed versions include 6.19.12 and 7.0. If you are running Linux kernel 2.6.31 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31777 actively exploited?

CVE-2026-31777 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31777

Medium

In the Linux kernel, the following vulnerability has been resolved: ALSA: ctxfi: Check the error for index mapping The ctxfi driver blindly assumed a proper value returned from daio_device_index(), but it's not always true. Add a proper error check to deal with the error from the function.

Package Linux Kernel

Published 2026-05-01

Last modified 2026-05-07

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 2.6.31 and later are affected. Fixed in 6.19.12, 7.0 and their respective stable series.

Affected from

≥ 2.6.31

Fixed in

✓ 6.19.12 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31777 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/277c6960d4ddb94d16198afd70c92c3d4593d131
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d4d3b8cbb70a2de247cbfe99bdb232aef9ed59bc
Patch

Details

CVE ID CVE-2026-31777

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-01

Modified 2026-05-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31777?

CVE-2026-31777 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 2.6.31 onward and has been patched in 6.19.12 and 7.0. CVE-2026-31777 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31777?

CVE-2026-31777 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-2026-31777?

Yes — CVE-2026-31777 has been patched. Fixed versions include 6.19.12 and 7.0. If you are running Linux kernel 2.6.31 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31777 actively exploited?

No — CVE-2026-31777 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.