Bug 2502424 (CVE-2026-63901)

Summary: CVE-2026-63901 kernel: USB: serial: digi_acceleport: fix memory corruption with small endpoints
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 digi_acceleport USB serial driver. A malicious Universal Serial Bus (USB) device could report smaller bulk-out buffers than expected. This lack of proper size validation could lead to out-of-bounds memory accesses or slab corruption, potentially causing system instability or a denial of service.
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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 16:07:24 UTC
In the Linux kernel, the following vulnerability has been resolved:

USB: serial: digi_acceleport: fix memory corruption with small endpoints

Add the missing bulk-out buffer size sanity checks to avoid
out-of-bounds memory accesses or slab corruption should a malicious
device report smaller buffers than expected.

Comment 1 Mauro Matteo Cascella 2026-07-21 17:13:01 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071943-CVE-2026-63901-f99b@gregkh/T