Bug 2502377 (CVE-2026-63956) - CVE-2026-63956 kernel: USB: serial: cypress_m8: fix memory corruption with small endpoint
Summary: CVE-2026-63956 kernel: USB: serial: cypress_m8: fix memory corruption with sm...
Keywords:
Status: NEW
Alias: CVE-2026-63956
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:04 UTC by OSIDB Bzimport
Modified: 2026-07-21 22:26 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-07-19 16:04:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

USB: serial: cypress_m8: fix memory corruption with small endpoint

Make sure that the interrupt-out endpoint max packet size is at least
eight bytes to avoid user-controlled slab corruption or NULL-pointer
dereference should a malicious device report a smaller size.
Comment 1 Keith Grant 2026-07-21 22:26:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071956-CVE-2026-63956-0fee@gregkh/T
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