CVE-2026-31619

Kernel crash via unchecked EFW status index

Published Apr 24, 2026 · Updated Apr 24, 2026

Out-of-bounds read in Linux kernel ALSA Fireworks before fixed branch releases allows local users to crash the kernel via malformed EFW responses. The response handler uses a 32-bit device-supplied status to index the 17-entry efr_status_names array, then treats the retrieved value as a string without first checking the index. Exploitation requires access to a FireWire audio device capable of returning a crafted status, and the documented consequence is an availability-only kernel interruption.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux kernel ALSA Fireworks before fixed branch releases allows local users to crash the kernel via malformed EFW responses. The response handler uses a 32-bit device-supplied status to index the 17-entry efr_status_names array, then treats the retrieved value as a string without first checking the index. Exploitation requires access to a FireWire audio device capable of returning a crafted status, and the documented consequence is an availability-only kernel interruption.

The record

CVE
CVE-2026-31619
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <67cfd14074cdafab5de3f7cfc0952c1a9b653e5d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <682d8accf0d83a871e8c327b95c81f53902c922b
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cc624b3d2be13297100539b64ad950695188e046
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e103f98f6615ed2934e9cf340654f0cad9eb8a8a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <67cfd14074cdafab5de3f7cfc0952c1a9b653e5d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <682d8accf0d83a871e8c327b95c81f53902c922b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cc624b3d2be13297100539b64ad950695188e046; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e103f98f6615ed2934e9cf340654f0cad9eb8a8a

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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