Vulnerability in Covesa Open1722
CVE-2026-73523
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Covesa Open1722 — versions 0
Weakness classification (CWE)
References
- github.com/COVESA/Open1722/issues/154 (issue-tracking)
- www.vulncheck.com/advisories/covesa-open1722-stack-memory-disclosure-via-acf-ca… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-73523?
- CVE-2026-73523 is a high-severity vulnerability in Covesa Open1722, classified under CWE-197. CVSS score: 7.5/10. Published 2026-08-17.
- How severe is CVE-2026-73523?
- High severity. CVSS v3 base score is 7.5 out of 10.