Bug 2383919 (CVE-2025-38497)

Summary: CVE-2025-38497 kernel: usb: gadget: configfs: Fix OOB read on empty string write
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-07-28 12:03:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

usb: gadget: configfs: Fix OOB read on empty string write

When writing an empty string to either 'qw_sign' or 'landingPage'
sysfs attributes, the store functions attempt to access page[l - 1]
before validating that the length 'l' is greater than zero.

This patch fixes the vulnerability by adding a check at the beginning
of os_desc_qw_sign_store() and webusb_landingPage_store() to handle
the zero-length input case gracefully by returning immediately.
Comment 1 Avinash Hanwate 2025-07-28 13:11:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072818-CVE-2025-38497-b5c7@gregkh/T