ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0

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Summary

CVECVE-2026-31620
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-24 15:16:41 UTC
Updated2026-04-28 14:11:42 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0 A malicious USB device with the TASCAM US-144MKII device id can have a configuration containing bInterfaceNumber=1 but no interface 0. USB configuration descriptors are not required to assign interface numbers sequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will then be dereferenced directly. Fix this up by checking the return value properly.

Risk And Classification

Primary CVSS: v3.1 4.6 MEDIUM from [email protected]

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

EPSS: 0.000180000 probability, percentile 0.046080000 (date 2026-04-27)

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 09b145c1f1331c40dc955c0024d636f25417cddb git Not specified
CNA Linux Linux affected dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602 git Not specified
CNA Linux Linux affected dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 d04dd67ab10dc978c6c843c6bd6a2a66a9444f51 git Not specified
CNA Linux Linux affected dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 48bd344e1040b9f2eb512be73c13f5db83efc191 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.24 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.14 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0.1 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/09b145c1f1331c40dc955c0024d636f25417cddb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/48bd344e1040b9f2eb512be73c13f5db83efc191 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d04dd67ab10dc978c6c843c6bd6a2a66a9444f51 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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