CVE-2025-40097
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-30

Last updated on: 2025-11-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: Fix missing pointer check in hda_component_manager_init function The __component_match_add function may assign the 'matchptr' pointer the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced. The call stack leading to the error looks like this: hda_component_manager_init |-> component_match_add |-> component_match_add_release |-> __component_match_add ( ... ,**matchptr, ... ) |-> *matchptr = ERR_PTR(-ENOMEM); // assign |-> component_master_add_with_match( ... match) |-> component_match_realloc(match, match->num); // dereference Add IS_ERR() check to prevent the crash. Found by Linux Verification Center (linuxtesting.org) with SVACE.
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Meta Information
Published
2025-10-30
Last Modified
2025-11-24
Generated
2026-05-07
AI Q&A
2025-10-30
EPSS Evaluated
2026-05-05
NVD
CVE-2025-40097
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a missing pointer check in the Linux kernel's ALSA hda_component_manager_init function. Specifically, the __component_match_add function may assign the 'matchptr' pointer the value ERR_PTR(-ENOMEM), which indicates an error due to memory allocation failure. However, this pointer is later dereferenced without checking if it contains an error value, leading to a potential crash. The fix involves adding an IS_ERR() check to prevent dereferencing an error pointer and thus avoid the crash.


How can this vulnerability impact me? :

This vulnerability can cause the Linux kernel to crash due to dereferencing an invalid pointer when handling ALSA hda component initialization. Such a crash can lead to system instability or denial of service, affecting the availability of the system or audio components relying on ALSA.


What immediate steps should I take to mitigate this vulnerability?

Apply the patch or update to the fixed version of the Linux kernel that includes the fix for the missing pointer check in the hda_component_manager_init function. This fix adds an IS_ERR() check to prevent the crash caused by dereferencing ERR_PTR(-ENOMEM).


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