Bug 2502353 (CVE-2026-63900)

Summary: CVE-2026-63900 kernel: USB: serial: keyspan: fix missing indat transfer sanity check
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's USB Keyspan serial driver. This vulnerability stems from a missing sanity check on the size of incoming data transfers for usa49wg indat transfers. This oversight could allow an attacker to cause the system to parse stale or uninitialized memory, potentially leading to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-07-19 16:03:32 UTC
In the Linux kernel, the following vulnerability has been resolved:

USB: serial: keyspan: fix missing indat transfer sanity check

Add the missing sanity check on the size of usa49wg indat transfers to
avoid parsing stale or uninitialised slab data.