CVE-2026-63959
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/0af00f1459f5dd757f0d392f8caa38039561ac62 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/0af00f1459f5dd757f0d392f8caa38039561ac62Patch
- https://git.kernel.org/stable/c/8a8cd4790b08c9f79ea2250b3bd933fd79f67e56Patch
- https://git.kernel.org/stable/c/9b496e3371c04f0a03b7faa5d2442536d00e3998Patch
- https://git.kernel.org/stable/c/aa2f716327be1818e1cb156da8a2844804aaec2fPatch
- https://git.kernel.org/stable/c/c4ab8e2d4432abb646c5c0687f8dab173da901f9Patch
- https://git.kernel.org/stable/c/dc17721d42e6d89f63572e63add8306a0e15eb3cPatch