Riskcovery

CVE-2026-72403

ALSA: FCP: Fix NULL pointer dereference in interface lookup

State
Published
Severity
Not scored
Published
Aug 15, 2026
Updated
Aug 17, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: FCP: Fix NULL pointer dereference in interface lookup

A malformed USB device can provide a vendor-specific interface without any endpoint descriptors. fcp_find_fc_interface() currently selects the first vendor-specific interface and reads endpoint 0 from it, without checking whether the interface actually has any endpoints.

When bNumEndpoints is zero, no endpoint array is allocated for the parsed alternate setting, so get_endpoint(..., 0) yields an invalid endpoint descriptor pointer. Dereferencing it through usb_endpoint_num() then triggers a NULL pointer dereference.

Skip vendor-specific interfaces that do not have any endpoints.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 46757a3e7d50dac923888e7fbe68377736f13c70 to before f28d7b5f1578a7501ab17b10643ed1e4f729187eAffected
  • 46757a3e7d50dac923888e7fbe68377736f13c70 to before 3ab06151ffcb8c3aeb8f78508658b6c0f05be932Affected
  • 46757a3e7d50dac923888e7fbe68377736f13c70 to before e1e31e0ec8a609e17fd2e86b77bc00d9cbb24d7cAffected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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