CVE-2026-19736 NXP MCUX TRNG - Buffer Overflow

NXP MCUX TRNG entropy driver in affected i.MX RT5xx and RT6xx devices contains a buffer overflow caused by improper handling of non-word-multiple byte requests in TRNG_GetRandomData(), letting unprivileged user-mode threads or kernel callers cause memory corruption beyond the buffer, exploit requires unprivileged access to entropy device or kernel mode call.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.11% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Data Tampering, Denial Of Service, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
11 October 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Apply the fix that aligns requests to word multiples and routes unaligned data through a safe bounce buffer; update to the fixed SDK or driver version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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