Bug 2502325 (CVE-2026-63899) - CVE-2026-63899 kernel: USB: serial: mxuport: fix memory corruption with small endpoint
Summary: CVE-2026-63899 kernel: USB: serial: mxuport: fix memory corruption with small...
Keywords:
Status: NEW
Alias: CVE-2026-63899
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:02 UTC by OSIDB Bzimport
Modified: 2026-07-21 20:45 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-19 16:02:01 UTC 
In the Linux kernel, the following vulnerability has been resolved:

USB: serial: mxuport: fix memory corruption with small endpoint

Make sure that the bulk-out endpoint max packet size is at least eight
bytes to avoid user-controlled slab corruption should a malicious device
report a smaller size.
Comment 1 Keith Grant 2026-07-21 20:43:52 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071943-CVE-2026-63899-cd10@gregkh/T
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