CVE-2026-72403
ALSA: FCP: Fix NULL pointer dereference in interface lookup
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.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Skip vendor-specific interfaces without endpoints.
- Verify interface endpoint descriptors.
- Apply kernel updates or patches.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72403.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72403 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72403
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72403 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72403 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': 'f28d7b5f1578a7501ab17b10643ed1e4f729187e', 'versionType': 'git'}, {'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': '3ab06151ffcb8c3aeb8f78508658b6c0f05be932', 'versionType': 'git'}, {'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': 'e1e31e0ec8a609e17fd2e86b77bc00d9cbb24d7c', 'versionType': 'git'}], 'programFiles': ['sound/usb/fcp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/fcp.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': 'f28d7b5f1578a7501ab17b10643ed1e4f729187e', 'versionType': 'git'}, {'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': '3ab06151ffcb8c3aeb8f78508658b6c0f05be932', 'versionType': 'git'}, {'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': 'e1e31e0ec8a609e17fd2e86b77bc00d9cbb24d7c', 'versionType': 'git'}], 'programFiles': ['sound/usb/fcp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/fcp.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': 'f28d7b5f1578a7501ab17b10643ed1e4f729187e', 'versionType': 'git'}, {'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': '3ab06151ffcb8c3aeb8f78508658b6c0f05be932', 'versionType': 'git'}, {'status': 'affected', 'version': '46757a3e7d50dac923888e7fbe68377736f13c70', 'lessThan': 'e1e31e0ec8a609e17fd2e86b77bc00d9cbb24d7c', 'versionType': 'git'}], 'programFiles': ['sound/usb/fcp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/usb/fcp.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/3ab06151ffcb8c3aeb8f78508658b6c0f05be932 Added Reference https://git.kernel.org/stable/c/e1e31e0ec8a609e17fd2e86b77bc00d9cbb24d7c Added Reference https://git.kernel.org/stable/c/f28d7b5f1578a7501ab17b10643ed1e4f729187e