Medium severity · published Oct 8, 2026
CVE-2017-20283
NXP MQX Classic before 5.0 contains an out-of-bounds write vulnerability in the RTCS UDP recvfrom() implementation
6.5
CVSS
1.2%
EPSS
No
On KEV
Description
NXP MQX Classic before 5.0 contains an out-of-bounds write vulnerability in the RTCS UDP recvfrom() implementation. Improper enforcement of the application-supplied receive buffer length may allow a crafted UDP packet to overflow the destination buffer, resulting in memory corruption, or denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MQ
MQX · NXP
before 5.0 Classic · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-20283
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-20283
community.nxp.com
https://community.nxp.com/t5/MQX-Software-Solutions/Horrible-memory-leak-in-recvfrom-that-has-gone-completely/m-p/705993
More from MQX
9.8
CVE-2021-22680
NXP MQX Versions 5.1 and prior are vulnerable to integer overflow in mem_alloc, _lwmem_alloc and _partition functions