Bug 2502405 (CVE-2026-63959) - CVE-2026-63959 kernel: usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT
Summary: CVE-2026-63959 kernel: usb: typec: tcpm/tcpci_maxim: validate header NDO agai...
Keywords:
Status: NEW
Alias: CVE-2026-63959
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:06 UTC by OSIDB Bzimport
Modified: 2026-07-21 22:51 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-07-19 16:06:25 UTC
In the Linux kernel, the following vulnerability has been resolved:

usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT

A broken/malicious port can transmit a CRC-valid frame whose header
advertises up to seven data objects but whose body carries fewer than
that.  Check for this, and rightfully reject the message, instead of
reading from uninitialized stack memory.


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