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Vulnerabilities CVE-2026-73523

CVE-2026-73523

High
Open
TLP:CLEAR

COVESA Open1722 0.9.2 Stack Memory Disclosure via acf-can-listener.c Integer Truncation

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Description

COVESA Open1722 through 0.9.2 contains an integer truncation vulnerability in acf-can-listener.c that allows unauthenticated remote attackers to cause the CAN listener to transmit process stack memory onto the CAN bus by sending a rejected UDP datagram with a matching AVTP stream ID. The num_can_msgs variable declared as uint8_t truncates the -1 error return value from avtp_to_can() to 255, causing a write loop to iterate 255 times over a 15-slot stack array and leak approximately 18 KB of adjacent stack memory as roughly 240 CAN frames to any recipient on the CAN bus.

Details

CVSS Score
8.7
EPSS Score
0.32%

25.2th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 17, 2026
Last Modified
Aug 17, 2026
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